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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.

478 items
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    Lands' End Swimsuit Cover Up (view 2)Lands' End Swimsuit Cover Up (view 1)
    View Product: Lands' End Swimsuit Cover Up

    Lands' End

    Swimsuit Cover Up
    Size 16
    $21.99
    42% off estimated retail
    Baby Boden Swimsuit Cover Up (view 2)Baby Boden Swimsuit Cover Up (view 1)
    View Product: Baby Boden Swimsuit Cover Up

    Baby Boden

    Swimsuit Cover Up
    Size 2
    $19.99
    25% 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 10
    $25.99
    60% off estimated retail
    Roxy One Piece Swimsuit (view 2)Roxy One Piece Swimsuit (view 1)
    View Product: Roxy One Piece Swimsuit

    Roxy

    One Piece Swimsuit
    Size X-Large youth
    $17.99
    56% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Athleta Rash Guard (view 2)Athleta Rash Guard (view 1)
    View Product: Athleta Rash Guard

    Athleta

    Rash Guard
    Size 16
    $21.99
    55% 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 Large kids
    $13.99
    57% off estimated retail
    Gap Kids One Piece Swimsuit (view 2)Gap Kids One Piece Swimsuit (view 1)
    View Product: Gap Kids One Piece Swimsuit

    Gap Kids

    One Piece Swimsuit
    Size 6
    $18.99
    55% off estimated retail
    Gap Kids One Piece Swimsuit (view 2)Gap Kids One Piece Swimsuit (view 1)
    View Product: Gap Kids One Piece Swimsuit

    Gap Kids

    One Piece Swimsuit
    Size Small kids
    $14.99
    53% 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 14
    $24.99
    49% off estimated retail
    Athleta Rash Guard (view 2)Athleta Rash Guard (view 1)
    View Product: Athleta Rash Guard

    Athleta

    Rash Guard
    Size 16
    $22.99
    53% off estimated retail
    Old Navy Two Piece Swimsuit (view 2)Old Navy Two Piece Swimsuit (view 1)
    View Product: Old Navy Two Piece Swimsuit

    Old Navy

    Two Piece Swimsuit
    Size 3T
    $9.99
    44% off estimated retail
    Old Navy Wetsuit (view 2)Old Navy Wetsuit (view 1)
    View Product: Old Navy Wetsuit

    Old Navy

    Wetsuit
    Size 4T
    $11.99
    42% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 3T
    $10.99
    35% off estimated retail
    Stella Cove One Piece Swimsuit (view 2)Stella Cove One Piece Swimsuit (view 1)
    View Product: Stella Cove One Piece Swimsuit

    Stella Cove

    One Piece Swimsuit
    Size 12
    $13.99
    65% off estimated retail
    Coolibar One Piece Swimsuit (view 2)Coolibar One Piece Swimsuit (view 1)
    View Product: Coolibar One Piece Swimsuit

    Coolibar

    One Piece Swimsuit
    Size Large youth
    $27.99
    42% off estimated retail
    Planet Sea Two Piece Swimsuit (view 2)Planet Sea Two Piece Swimsuit (view 1)
    View Product: Planet Sea Two Piece Swimsuit

    Planet Sea

    Two Piece Swimsuit
    Size 6
    $17.99
    28% off estimated retail
    Stella Cove One Piece Swimsuit (view 2)Stella Cove One Piece Swimsuit (view 1)
    View Product: Stella Cove One Piece Swimsuit

    Stella Cove

    One Piece Swimsuit
    Size 12
    $13.99
    65% off estimated retail
    Wonder Nation Two Piece Swimsuit (view 2)Wonder Nation Two Piece Swimsuit (view 1)
    View Product: Wonder Nation Two Piece Swimsuit

    Wonder Nation

    Two Piece Swimsuit
    Size X-Small kids
    $11.99
    14% off estimated retail
    Athleta Board Shorts (view 2)Athleta Board Shorts (view 1)
    View Product: Athleta Board Shorts

    Athleta

    Board Shorts
    Size 14
    $15.99
    51% off estimated retail
    Nike One Piece Swimsuit (view 2)Nike One Piece Swimsuit (view 1)
    View Product: Nike One Piece Swimsuit

    Nike

    One Piece Swimsuit
    Size 14
    $17.99
    53% off estimated retail
    Crewcuts Wetsuit (view 2)Crewcuts Wetsuit (view 1)
    View Product: Crewcuts Wetsuit

    Crewcuts

    Wetsuit
    Size 4
    $19.99
    75% 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 4T
    $12.99
    27% off estimated retail
    Nickelodeon Rash Guard (view 2)Nickelodeon Rash Guard (view 1)
    View Product: Nickelodeon Rash Guard

    Nickelodeon

    Rash Guard
    Size 5T
    $13.99
    40% off estimated retail
    Athleta Rash Guard (view 2)Athleta Rash Guard (view 1)
    View Product: Athleta Rash Guard

    Athleta

    Rash Guard
    Size 14
    $20.99
    57% 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
    $13.99
    44% 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 14
    $12.99
    38% 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 12
    $15.99
    51% off estimated retail
    Freestyle By Danskin One Piece Swimsuit (view 2)Freestyle By Danskin One Piece Swimsuit (view 1)
    View Product: Freestyle By Danskin One Piece Swimsuit

    Freestyle By Danskin

    One Piece Swimsuit
    Size 6
    $13.99
    18% off estimated retail
    Little Me One Piece Swimsuit (view 2)Little Me One Piece Swimsuit (view 1)
    View Product: Little Me One Piece Swimsuit

    Little Me

    One Piece Swimsuit
    Size 2T
    $16.99
    12% off estimated retail
    Rugged Butts Rash Guard (view 2)Rugged Butts Rash Guard (view 1)
    View Product: Rugged Butts Rash Guard

    Rugged Butts

    Rash Guard
    Size 6
    $16.99
    44% off estimated retail
    H&M One Piece Swimsuit (view 2)H&M One Piece Swimsuit (view 1)
    View Product: H&M One Piece Swimsuit

    H&M

    One Piece Swimsuit
    Size 8
    $14.99
    35% off estimated retail
    Vineyard Vines Swimsuit Cover Up (view 2)Vineyard Vines Swimsuit Cover Up (view 1)
    View Product: Vineyard Vines Swimsuit Cover Up

    Vineyard Vines

    Swimsuit Cover Up
    Size 14
    $15.99
    65% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 7
    $15.99
    23% off estimated retail
    Pokemon One Piece Swimsuit (view 2)Pokemon One Piece Swimsuit (view 1)
    View Product: Pokemon One Piece Swimsuit

    Pokemon

    One Piece Swimsuit
    Size 10
    $9.99
    37% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 6
    $11.99
    29% off estimated retail
    Baby Gap One Piece Swimsuit (view 2)Baby Gap One Piece Swimsuit (view 1)
    View Product: Baby Gap One Piece Swimsuit

    Baby Gap

    One Piece Swimsuit
    Size 4
    $12.99
    51% 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 10
    $15.99
    51% off estimated retail
    Marina West One Piece Swimsuit (view 2)Marina West One Piece Swimsuit (view 1)
    View Product: Marina West One Piece Swimsuit

    Marina West

    One Piece Swimsuit
    Size 10
    $10.99
    56% 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 5
    $14.99
    44% off estimated retail
    Hanna Andersson One Piece Swimsuit (view 2)Hanna Andersson One Piece Swimsuit (view 1)
    View Product: Hanna Andersson One Piece Swimsuit

    Hanna Andersson

    One Piece Swimsuit
    Size 120 cm
    $26.99
    34% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 7
    $13.99
    17% off estimated retail
    Petit Peony One Piece Swimsuit (view 2)Petit Peony One Piece Swimsuit (view 1)
    View Product: Petit Peony One Piece Swimsuit

    Petit Peony

    One Piece Swimsuit
    Size 5
    $18.99
    72% off estimated retail
    More Than Magic One Piece Swimsuit (view 2)More Than Magic One Piece Swimsuit (view 1)
    View Product: More Than Magic One Piece Swimsuit

    More Than Magic

    One Piece Swimsuit
    Size 6
    $11.99
    25% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)New With Tags
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 130 cm
    $14.99
    54% off estimated retail
    Baby Boden Swimsuit Cover Up (view 2)Baby Boden Swimsuit Cover Up (view 1)
    View Product: Baby Boden Swimsuit Cover Up

    Baby Boden

    Swimsuit Cover Up
    Size 3-6 mo
    $10.99
    59% off estimated retail
    Baby Gap One Piece Swimsuit (view 2)Baby Gap One Piece Swimsuit (view 1)
    View Product: Baby Gap One Piece Swimsuit

    Baby Gap

    One Piece Swimsuit
    Size 4
    $14.99
    44% off estimated retail
    Peppa Pig One Piece Swimsuit (view 2)Peppa Pig One Piece Swimsuit (view 1)
    View Product: Peppa Pig One Piece Swimsuit

    Peppa Pig

    One Piece Swimsuit
    Size 12 mo
    $8.99
    18% off estimated retail
    Polo by Ralph Lauren Rash Guard (view 2)Polo by Ralph Lauren Rash Guard (view 1)
    View Product: Polo by Ralph Lauren Rash Guard
    Size 5
    $12.99
    67% off estimated retail
    Assorted Brands Wetsuit (view 2)Assorted Brands Wetsuit (view 1)
    View Product: Assorted Brands Wetsuit
    Size 16
    $25.99
    61% off estimated retail
    Crewcuts One Piece Swimsuit (view 2)Crewcuts One Piece Swimsuit (view 1)Flawed Gem
    View Product: Crewcuts One Piece Swimsuit

    Crewcuts

    One Piece Swimsuit
    Size 10
    $20.99
    57% 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 10
    $27.99
    53% off estimated retail
    Tommy Bahama One Piece Swimsuit (view 2)Tommy Bahama One Piece Swimsuit (view 1)
    View Product: Tommy Bahama One Piece Swimsuit

    Tommy Bahama

    One Piece Swimsuit
    Size 3T
    $18.99
    44% 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 10
    $26.99
    61% 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 12
    $27.99
    51% off estimated retail
    New York One Piece Swimsuit (view 2)New York One Piece Swimsuit (view 1)
    View Product: New York One Piece Swimsuit

    New York

    One Piece Swimsuit
    Size 5T
    $8.99
    42% off estimated retail
    Millie Loves Lily Rash Guard (view 2)Millie Loves Lily Rash Guard (view 1)
    View Product: Millie Loves Lily Rash Guard
    Size 5
    $17.99
    52% off estimated retail
    Disney One Piece Swimsuit (view 2)Disney One Piece Swimsuit (view 1)
    View Product: Disney One Piece Swimsuit

    Disney

    One Piece Swimsuit
    Size 5
    $15.99
    38% 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 10
    $12.99
    23% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)New With Tags
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 12
    $25.99
    47% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)New With Tags
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 14
    $13.99
    57% 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 7
    $26.99
    55% 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 18 mo
    $14.99
    42% off estimated retail
    Assorted Brands Wetsuit (view 2)Assorted Brands Wetsuit (view 1)
    View Product: Assorted Brands Wetsuit
    Size 6-9 mo
    $16.99
    61% off estimated retail
    Balera Dancewear One Piece Swimsuit (view 2)Balera Dancewear One Piece Swimsuit (view 1)
    View Product: Balera Dancewear One Piece Swimsuit

    Balera Dancewear

    One Piece Swimsuit
    Size Large kids
    $21.99
    45% off estimated retail
    Balera Dancewear Board Shorts (view 2)Balera Dancewear Board Shorts (view 1)
    View Product: Balera Dancewear Board Shorts

    Balera Dancewear

    Board Shorts
    Size Large infants
    $6.99
    53% 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
    $27.99
    36% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 2T
    $13.99
    29% off estimated retail
    Play Baby Rash Guard (view 2)Play Baby Rash Guard (view 1)
    View Product: Play Baby Rash Guard

    Play Baby

    Rash Guard
    Size 18 mo
    $8.99
    27% off estimated retail
    Vineyard Vines Performance Rash Guard (view 2)Vineyard Vines Performance Rash Guard (view 1)
    View Product: Vineyard Vines Performance Rash Guard
    Size X-Small kids
    $21.99
    44% off estimated retail
    Bella Bliss One Piece Swimsuit (view 2)Bella Bliss One Piece Swimsuit (view 1)
    View Product: Bella Bliss One Piece Swimsuit

    Bella Bliss

    One Piece Swimsuit
    Size 5
    $17.99
    63% off estimated retail
    Speedo Two Piece Swimsuit (view 2)Speedo Two Piece Swimsuit (view 1)
    View Product: Speedo Two Piece Swimsuit

    Speedo

    Two Piece Swimsuit
    Size X-Small kids
    $11.99
    45% 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 16
    $10.99
    69% off estimated retail
    Tea Rash Guard (view 2)Tea Rash Guard (view 1)
    View Product: Tea Rash Guard

    Tea

    Rash Guard
    Size 8
    $18.99
    53% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 6X
    $8.99
    53% off estimated retail
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)Flawed Gem
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 7
    $21.99
    50% 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 Large youth
    $16.99
    51% off estimated retail
    Sunuva One Piece Swimsuit (view 2)Sunuva One Piece Swimsuit (view 1)
    View Product: Sunuva One Piece Swimsuit

    Sunuva

    One Piece Swimsuit
    Size 3
    $15.99
    72% off estimated retail
    Tea Rash Guard (view 2)Tea Rash Guard (view 1)
    View Product: Tea Rash Guard

    Tea

    Rash Guard
    Size 12-18 mo
    $13.99
    55% 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 130 cm
    $12.99
    60% off estimated retail
    Abercrombie Two Piece Swimsuit (view 2)Abercrombie Two Piece Swimsuit (view 1)
    View Product: Abercrombie Two Piece Swimsuit

    Abercrombie

    Two Piece Swimsuit
    Size 7
    $13.99
    64% off estimated retail
    Zara One Piece Swimsuit (view 2)Zara One Piece Swimsuit (view 1)
    View Product: Zara One Piece Swimsuit

    Zara

    One Piece Swimsuit
    Size 12-24 mo
    Dolfin One Piece Swimsuit (view 2)Dolfin One Piece Swimsuit (view 1)
    View Product: Dolfin One Piece Swimsuit

    Dolfin

    One Piece Swimsuit
    Size X-Large tots

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