About
ThredUp LogoThredUp
Shop
SellCleanout animation
Beta
My ThredUp
Account
0
Check out

Whether it's for summertime or swimming lessons, your girls need the right gear for when they dive into the water. Check out thredUP's selection of girls' swimwear to discover items from top brands at up to 90% off estimated retail.

8Remove filter
88 items
Sort by:
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 8
    $18.99
    50% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 8
    $14.99
    54% off estimated retail
    Maaji Board Shorts (view 2)Maaji Board Shorts (view 1)
    View Product: Maaji Board Shorts

    Maaji

    Board Shorts
    Size 8
    $16.99
    73% off estimated retail
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 8
    $17.99
    52% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 8
    $17.99
    33% off estimated retail
    Molo Wetsuit (view 2)Molo Wetsuit (view 1)
    View Product: Molo Wetsuit

    Molo

    Wetsuit
    Size 8
    $40.99
    75% off estimated retail
    Roxy Two Piece Swimsuit (view 2)Roxy Two Piece Swimsuit (view 1)
    View Product: Roxy Two Piece Swimsuit

    Roxy

    Two Piece Swimsuit
    Size 8
    $16.99
    58% off estimated retail
    Zara Two Piece Swimsuit (view 2)Zara Two Piece Swimsuit (view 1)
    View Product: Zara Two Piece Swimsuit

    Zara

    Two Piece Swimsuit
    Size 8
    $16.99
    48% off estimated retail
    Zella Two Piece Swimsuit (view 2)Zella Two Piece Swimsuit (view 1)
    View Product: Zella Two Piece Swimsuit

    Zella

    Two Piece Swimsuit
    Size 8
    $12.99
    48% off estimated retail
    Art Class One Piece Swimsuit (view 2)Art Class One Piece Swimsuit (view 1)
    View Product: Art Class One Piece Swimsuit

    Art Class

    One Piece Swimsuit
    Size 8
    $9.99
    50% off estimated retail
    Hurley Wetsuit (view 2)Hurley Wetsuit (view 1)
    View Product: Hurley Wetsuit

    Hurley

    Wetsuit
    Size 8
    $30.99
    68% off estimated retail
    H&M Two Piece Swimsuit (view 2)H&M Two Piece Swimsuit (view 1)
    View Product: H&M Two Piece Swimsuit

    H&M

    Two Piece Swimsuit
    Size 8
    $10.99
    38% off estimated retail
    Shade Critters One Piece Swimsuit (view 2)Shade Critters One Piece Swimsuit (view 1)
    View Product: Shade Critters One Piece Swimsuit

    Shade Critters

    One Piece Swimsuit
    Size 8
    $23.99
    63% off estimated retail
    Wear Moi One Piece Swimsuit (view 2)Wear Moi One Piece Swimsuit (view 1)New With Tags
    View Product: Wear Moi One Piece Swimsuit

    Wear Moi

    One Piece Swimsuit
    Size 8
    $17.99
    70% off estimated retail
    Unbranded Two Piece Swimsuit (view 2)Unbranded Two Piece Swimsuit (view 1)
    View Product: Unbranded Two Piece Swimsuit

    Unbranded

    Two Piece Swimsuit
    Size 8
    $12.99
    60% off estimated retail
    Justice Board Shorts (view 2)Justice Board Shorts (view 1)
    View Product: Justice Board Shorts

    Justice

    Board Shorts
    Size 8
    $17.99
    18% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 8
    $15.99
    51% off estimated retail
    PilyQ Two Piece Swimsuit (view 2)PilyQ Two Piece Swimsuit (view 1)
    View Product: PilyQ Two Piece Swimsuit

    PilyQ

    Two Piece Swimsuit
    Size 8
    $24.99
    74% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 8
    $11.99
    63% off estimated retail
    Dolfin One Piece Swimsuit (view 2)Dolfin One Piece Swimsuit (view 1)
    View Product: Dolfin One Piece Swimsuit

    Dolfin

    One Piece Swimsuit
    Size 8
    $11.99
    40% off estimated retail
    O'Neill Wetsuit (view 2)O'Neill Wetsuit (view 1)
    View Product: O'Neill Wetsuit

    O'Neill

    Wetsuit
    Size 8
    $26.99
    58% off estimated retail
    Kanu Surf Rash Guard (view 2)Kanu Surf Rash Guard (view 1)
    View Product: Kanu Surf Rash Guard

    Kanu Surf

    Rash Guard
    Size 8
    $12.99
    60% off estimated retail
    Carter's Two Piece Swimsuit (view 2)Carter's Two Piece Swimsuit (view 1)
    View Product: Carter's Two Piece Swimsuit

    Carter's

    Two Piece Swimsuit
    Size 8
    $14.99
    61% off estimated retail
    UV Skinz Rash Guard (view 2)UV Skinz Rash Guard (view 1)
    View Product: UV Skinz Rash Guard

    UV Skinz

    Rash Guard
    Size 8
    $16.99
    58% off estimated retail
    Assorted Brands Rash Guard (view 2)Assorted Brands Rash Guard (view 1)
    View Product: Assorted Brands Rash Guard

    Assorted Brands

    Rash Guard
    Size 8
    $15.99
    51% off estimated retail
    Old Navy One Piece Swimsuit (view 2)Old Navy One Piece Swimsuit (view 1)
    View Product: Old Navy One Piece Swimsuit

    Old Navy

    One Piece Swimsuit
    Size 8
    $7.99
    55% off estimated retail
    Athleta One Piece Swimsuit (view 2)Athleta One Piece Swimsuit (view 1)
    View Product: Athleta One Piece Swimsuit

    Athleta

    One Piece Swimsuit
    Size 8
    $27.99
    42% off estimated retail
    Art Class Rash Guard (view 2)Art Class Rash Guard (view 1)
    View Product: Art Class Rash Guard

    Art Class

    Rash Guard
    Size 8
    $11.99
    40% off estimated retail
    Assorted Brands Wetsuit (view 2)Assorted Brands Wetsuit (view 1)
    View Product: Assorted Brands Wetsuit

    Assorted Brands

    Wetsuit
    Size 8
    $24.99
    61% off estimated retail
    Zella Two Piece Swimsuit (view 2)Zella Two Piece Swimsuit (view 1)
    View Product: Zella Two Piece Swimsuit

    Zella

    Two Piece Swimsuit
    Size 8
    $14.99 $11.24 25% off with code THANKU
    40% off estimated retail
    Garnet Hill One Piece Swimsuit (view 2)Garnet Hill One Piece Swimsuit (view 1)
    View Product: Garnet Hill One Piece Swimsuit

    Garnet Hill

    One Piece Swimsuit
    Size 8
    $14.99 $11.24 25% off with code THANKU
    54% off estimated retail
    Kanu Surf Rash Guard (view 2)Kanu Surf Rash Guard (view 1)
    View Product: Kanu Surf Rash Guard

    Kanu Surf

    Rash Guard
    Size 8
    $17.99 $13.49 25% off with code THANKU
    45% off estimated retail
    Mirella One Piece Swimsuit (view 2)Mirella One Piece Swimsuit (view 1)
    View Product: Mirella One Piece Swimsuit

    Mirella

    One Piece Swimsuit
    Size 8
    $15.99 $12.79 20% off with code THANKU
    61% off estimated retail
    Cat & Jack Two Piece Swimsuit (view 2)Cat & Jack Two Piece Swimsuit (view 1)
    View Product: Cat & Jack Two Piece Swimsuit

    Cat & Jack

    Two Piece Swimsuit
    Size 8
    $8.99 $7.19 20% off with code THANKU
    47% off estimated retail
    Andy & Evan Two Piece Swimsuit (view 2)Andy & Evan Two Piece Swimsuit (view 1)
    View Product: Andy & Evan Two Piece Swimsuit

    Andy & Evan

    Two Piece Swimsuit
    Size 8
    $19.99 $13.99 30% off with code THANKU
    75% off estimated retail
    Justice One Piece Swimsuit (view 2)Justice One Piece Swimsuit (view 1)
    View Product: Justice One Piece Swimsuit

    Justice

    One Piece Swimsuit
    Size 8
    $23.99 $14.39 40% off with code THANKU
    31% off estimated retail
    Mini Boden Two Piece Swimsuit (view 2)Mini Boden Two Piece Swimsuit (view 1)Flawed Gem
    View Product: Mini Boden Two Piece Swimsuit

    Mini Boden

    Two Piece Swimsuit
    Size 8
    $17.99 $11.69 35% off with code THANKU
    40% off estimated retail
    Billabong One Piece Swimsuit (view 2)Billabong One Piece Swimsuit (view 1)
    View Product: Billabong One Piece Swimsuit

    Billabong

    One Piece Swimsuit
    Size 8
    $13.99 $10.49 25% off with code THANKU
    65% off estimated retail
    Janie and Jack Two Piece Swimsuit (view 2)Janie and Jack Two Piece Swimsuit (view 1)
    View Product: Janie and Jack Two Piece Swimsuit

    Janie and Jack

    Two Piece Swimsuit
    Size 8
    $14.99 $11.99 20% off with code THANKU
    64% off estimated retail
    Mott 50 Rash Guard (view 2)Mott 50 Rash Guard (view 1)
    View Product: Mott 50 Rash Guard

    Mott 50

    Rash Guard
    Size 8
    $20.99 $16.79 20% off with code THANKU
    67% off estimated retail
    Splendid One Piece Swimsuit (view 2)Splendid One Piece Swimsuit (view 1)
    View Product: Splendid One Piece Swimsuit

    Splendid

    One Piece Swimsuit
    Size 8
    $15.99 $12.79 20% off with code THANKU
    67% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 8
    $38.99 $27.29 30% off with code THANKU
    46% off estimated retail
    Lands' End Rash Guard (view 2)Lands' End Rash Guard (view 1)
    View Product: Lands' End Rash Guard

    Lands' End

    Rash Guard
    Size 8
    $26.99 $18.89 30% off with code THANKU
    55% off estimated retail
    Little Peixoto Two Piece Swimsuit (view 2)Little Peixoto Two Piece Swimsuit (view 1)
    View Product: Little Peixoto Two Piece Swimsuit

    Little Peixoto

    Two Piece Swimsuit
    Size 8
    $23.99 $17.99 25% off with code THANKU
    63% off estimated retail
    Mirella One Piece Swimsuit (view 2)Mirella One Piece Swimsuit (view 1)
    View Product: Mirella One Piece Swimsuit

    Mirella

    One Piece Swimsuit
    Size 8
    $14.99 $11.99 20% off with code THANKU
    63% off estimated retail
    Gap Kids Board Shorts (view 2)Gap Kids Board Shorts (view 1)
    View Product: Gap Kids Board Shorts

    Gap Kids

    Board Shorts
    Size 8
    $10.99 $8.24 25% off with code THANKU
    65% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 8
    $16.99 $12.74 25% off with code THANKU
    56% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 8
    $14.99 $10.49 30% off with code THANKU
    40% off estimated retail
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 8
    $16.99 $11.89 30% off with code THANKU
    41% off estimated retail
    Justice Swimsuit Cover Up (view 2)Justice Swimsuit Cover Up (view 1)
    View Product: Justice Swimsuit Cover Up

    Justice

    Swimsuit Cover Up
    Size 8
    $16.99 $12.74 25% off with code THANKU
    48% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 8
    $14.99 $10.49 30% off with code THANKU
    54% off estimated retail
    Ivivva One Piece Swimsuit (view 2)Ivivva One Piece Swimsuit (view 1)
    View Product: Ivivva One Piece Swimsuit

    Ivivva

    One Piece Swimsuit
    Size 8
    $19.99 $11.99 40% off with code THANKU
    59% off estimated retail
    Art Class Swimsuit Cover Up (view 2)Art Class Swimsuit Cover Up (view 1)
    View Product: Art Class Swimsuit Cover Up

    Art Class

    Swimsuit Cover Up
    Size 8
    $9.99 $7.99 20% off with code THANKU
    50% off estimated retail
    Roberta Roller Rabbit Swimsuit Cover Up (view 2)Roberta Roller Rabbit Swimsuit Cover Up (view 1)
    View Product: Roberta Roller Rabbit Swimsuit Cover Up

    Roberta Roller Rabbit

    Swimsuit Cover Up
    Size 8
    $14.99 $9.74 35% off with code THANKU
    81% off estimated retail
    Hanna Andersson Rash Guard (view 2)Hanna Andersson Rash Guard (view 1)
    View Product: Hanna Andersson Rash Guard

    Hanna Andersson

    Rash Guard
    Size 8
    $25.99 $14.29 45% off with code THANKU
    36% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 8
    $13.99 $11.19 20% off with code THANKU
    53% off estimated retail
    Juicy Couture One Piece Swimsuit (view 2)Juicy Couture One Piece Swimsuit (view 1)
    View Product: Juicy Couture One Piece Swimsuit

    Juicy Couture

    One Piece Swimsuit
    Size 8
    $19.99 $15.99 20% off with code THANKU
    79% off estimated retail
    Justice One Piece Swimsuit (view 2)Justice One Piece Swimsuit (view 1)
    View Product: Justice One Piece Swimsuit

    Justice

    One Piece Swimsuit
    Size 8
    $23.99 $15.59 35% off with code THANKU
    31% off estimated retail
    Kanu Surf Rash Guard (view 2)Kanu Surf Rash Guard (view 1)
    View Product: Kanu Surf Rash Guard

    Kanu Surf

    Rash Guard
    Size 8
    $15.99 $12.79 20% off with code THANKU
    51% off estimated retail
    Aqua Sphere One Piece Swimsuit (view 2)Aqua Sphere One Piece Swimsuit (view 1)
    View Product: Aqua Sphere One Piece Swimsuit

    Aqua Sphere

    One Piece Swimsuit
    Size 8
    $11.99 $9.59 20% off with code THANKU
    25% off estimated retail
    Hobie One Piece Swimsuit (view 2)Hobie One Piece Swimsuit (view 1)
    View Product: Hobie One Piece Swimsuit

    Hobie

    One Piece Swimsuit
    Size 8
    $12.99 $10.39 20% off with code THANKU
    77% off estimated retail
    Kanu Surf Rash Guard (view 2)Kanu Surf Rash Guard (view 1)
    View Product: Kanu Surf Rash Guard

    Kanu Surf

    Rash Guard
    Size 8
    $13.99 $11.19 20% off with code THANKU
    57% off estimated retail
    Art Class Two Piece Swimsuit (view 2)Art Class Two Piece Swimsuit (view 1)
    View Product: Art Class Two Piece Swimsuit

    Art Class

    Two Piece Swimsuit
    Size 8
    $10.99 $8.79 20% off with code THANKU
    45% off estimated retail
    Mirella One Piece Swimsuit (view 2)Mirella One Piece Swimsuit (view 1)
    View Product: Mirella One Piece Swimsuit

    Mirella

    One Piece Swimsuit
    Size 8
    $16.99 $13.59 20% off with code THANKU
    58% off estimated retail
    Hanna Andersson Two Piece Swimsuit (view 2)Hanna Andersson Two Piece Swimsuit (view 1)
    View Product: Hanna Andersson Two Piece Swimsuit

    Hanna Andersson

    Two Piece Swimsuit
    Size 8
    $23.99 $16.79 30% off with code THANKU
    41% off estimated retail
    Les Tout Petits One Piece Swimsuit (view 2)Les Tout Petits One Piece Swimsuit (view 1)
    View Product: Les Tout Petits One Piece Swimsuit

    Les Tout Petits

    One Piece Swimsuit
    Size 8
    $19.99 $15.99 20% off with code THANKU
    79% off estimated retail
    Sunshine Swing Rash Guard (view 2)Sunshine Swing Rash Guard (view 1)
    View Product: Sunshine Swing Rash Guard

    Sunshine Swing

    Rash Guard
    Size 8
    $9.99 $7.99 20% off with code THANKU
    60% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 8
    $13.99 $10.49 25% off with code THANKU
    57% off estimated retail
    Zara Kids Two Piece Swimsuit (view 2)Zara Kids Two Piece Swimsuit (view 1)
    View Product: Zara Kids Two Piece Swimsuit

    Zara Kids

    Two Piece Swimsuit
    Size 8
    $11.99 $9.59 20% off with code THANKU
    70% off estimated retail
    Calypso St. Barth One Piece Swimsuit (view 2)Calypso St. Barth One Piece Swimsuit (view 1)
    View Product: Calypso St. Barth One Piece Swimsuit

    Calypso St. Barth

    One Piece Swimsuit
    Size 8
    $26.99 $20.24 25% off with code THANKU
    79% off estimated retail
    Nautica One Piece Swimsuit (view 2)Nautica One Piece Swimsuit (view 1)
    View Product: Nautica One Piece Swimsuit

    Nautica

    One Piece Swimsuit
    Size 8
    $14.99 $11.99 20% off with code THANKU
    54% off estimated retail
    Old Navy Rash Guard (view 2)Old Navy Rash Guard (view 1)
    View Product: Old Navy Rash Guard

    Old Navy

    Rash Guard
    Size 8
    $10.99 $8.79 20% off with code THANKU
    31% off estimated retail
    Sunshine Swing Two Piece Swimsuit (view 2)Sunshine Swing Two Piece Swimsuit (view 1)
    View Product: Sunshine Swing Two Piece Swimsuit

    Sunshine Swing

    Two Piece Swimsuit
    Size 8
    $17.99 $13.49 25% off with code THANKU
    53% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 8
    $14.99
    54% off estimated retail
    Under Armour Rash Guard (view 2)Under Armour Rash Guard (view 1)
    View Product: Under Armour Rash Guard

    Under Armour

    Rash Guard
    Size 8
    $16.99 $12.74 25% off with code THANKU
    58% off estimated retail
    boo gemes Swimsuit Cover Up (view 2)boo gemes Swimsuit Cover Up (view 1)Price Drop
    View Product: boo gemes Swimsuit Cover Up

    boo gemes

    Swimsuit Cover Up
    Size 8
    $26.99 $20.24 25% off with code THANKU
    64% off estimated retail
    Big Chill Rash Guard (view 2)Big Chill Rash Guard (view 1)
    View Product: Big Chill Rash Guard

    Big Chill

    Rash Guard
    Size 8
    $11.99 $9.59 20% off with code THANKU
    25% off estimated retail
    Ruffle Butts Two Piece Swimsuit (view 2)Ruffle Butts Two Piece Swimsuit (view 1)
    View Product: Ruffle Butts Two Piece Swimsuit

    Ruffle Butts

    Two Piece Swimsuit
    Size 8
    $8.99 $7.19 20% off with code THANKU
    43% off estimated retail
    Gossip Girl One Piece Swimsuit (view 2)Gossip Girl One Piece Swimsuit (view 1)Price Drop
    View Product: Gossip Girl One Piece Swimsuit

    Gossip Girl

    One Piece Swimsuit
    Size 8
    $18.99 $13.29 30% off with code THANKU
    42% off estimated retail
    Stella Cove One Piece Swimsuit (view 2)Stella Cove One Piece Swimsuit (view 1)Price Drop
    View Product: Stella Cove One Piece Swimsuit

    Stella Cove

    One Piece Swimsuit
    Size 8
    $15.99 $11.19 30% off with code THANKU
    61% off estimated retail
    Ivivva One Piece Swimsuit (view 2)Ivivva One Piece Swimsuit (view 1)Price Drop
    View Product: Ivivva One Piece Swimsuit

    Ivivva

    One Piece Swimsuit
    Size 8
    $20.99 $13.64 35% off with code THANKU
    57% off estimated retail
    Unbranded Swimsuit Cover Up (view 2)Unbranded Swimsuit Cover Up (view 1)Price Drop
    View Product: Unbranded Swimsuit Cover Up

    Unbranded

    Swimsuit Cover Up
    Size 8
    $15.99 $8.79 45% off with code THANKU
    51% off estimated retail
    Zella Girl Rash Guard (view 2)Zella Girl Rash Guard (view 1)Price Drop
    View Product: Zella Girl Rash Guard

    Zella Girl

    Rash Guard
    Size 8
    $9.99 $7.99 20% off with code THANKU
    60% off estimated retail
    Adidas Rash Guard (view 2)Adidas Rash Guard (view 1)Price Drop
    View Product: Adidas Rash Guard

    Adidas

    Rash Guard
    Size 8
    $11.99 $8.99 25% off with code THANKU
    70% off estimated retail
    Assorted Brands Swimsuit Cover Up (view 2)Assorted Brands Swimsuit Cover Up (view 1)Price Drop
    View Product: Assorted Brands Swimsuit Cover Up

    Assorted Brands

    Swimsuit Cover Up
    Size 8
    $20.99 $9.45 55% off with code THANKU
    84% off estimated retail
    Southern Tide Rash Guard (view 2)Southern Tide Rash Guard (view 1)Price Drop
    View Product: Southern Tide Rash Guard

    Southern Tide

    Rash Guard
    Size 8
    $12.99 $9.09 30% off with code THANKU
    73% off estimated retail
    Maaji Rash Guard (view 2)Maaji Rash Guard (view 1)Price Drop
    View Product: Maaji Rash Guard

    Maaji

    Rash Guard
    Size 8
    $11.99 $8.99 25% off with code THANKU
    87% off estimated retail
    Assorted Brands Swimsuit Cover Up (view 2)Assorted Brands Swimsuit Cover Up (view 1)Price Drop
    View Product: Assorted Brands Swimsuit Cover Up

    Assorted Brands

    Swimsuit Cover Up
    Size 8
    $8.99 $6.29 30% off with code THANKU
    72% off estimated retail
    Back
    1
    Next

    Loading...