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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.

2Remove filter9-12 moRemove filter
42 items
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    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 2
    $10.99
    59% off estimated retail
    Little Creative Factory One Piece Swimsuit (view 2)Little Creative Factory One Piece Swimsuit (view 1)
    View Product: Little Creative Factory One Piece Swimsuit

    Little Creative Factory

    One Piece Swimsuit
    Size 2
    $25.99
    60% 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 2
    $11.99
    55% off estimated retail
    Zimmermann One Piece Swimsuit (view 2)Zimmermann One Piece Swimsuit (view 1)
    View Product: Zimmermann One Piece Swimsuit

    Zimmermann

    One Piece Swimsuit
    Size 2
    $65.99
    34% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Tea Rash Guard (view 2)Tea Rash Guard (view 1)
    View Product: Tea Rash Guard

    Tea

    Rash Guard
    Size 9-12 mo
    $14.99
    44% off estimated retail
    Mud Pie One Piece Swimsuit (view 2)Mud Pie One Piece Swimsuit (view 1)
    View Product: Mud Pie One Piece Swimsuit

    Mud Pie

    One Piece Swimsuit
    Size 9-12 mo
    $9.99 $7.99 20% off with code THANKU
    54% off estimated retail
    Old Navy Board Shorts (view 2)Old Navy Board Shorts (view 1)
    View Product: Old Navy Board Shorts

    Old Navy

    Board Shorts
    Size 2
    $10.99 $8.79 20% off with code THANKU
    21% 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 9-12 mo
    $7.99 $6.39 20% off with code THANKU
    38% 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 2
    $8.99 $7.19 20% off with code THANKU
    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 2
    $14.99 $11.99 20% off with code THANKU
    44% off estimated retail
    Tucker + Tate Rash Guard (view 2)Tucker + Tate Rash Guard (view 1)
    View Product: Tucker + Tate Rash Guard

    Tucker + Tate

    Rash Guard
    Size 2
    $4.99 $3.99 20% off with code THANKU
    81% off estimated retail
    PatPat One Piece Swimsuit (view 2)PatPat One Piece Swimsuit (view 1)
    View Product: PatPat One Piece Swimsuit

    PatPat

    One Piece Swimsuit
    Size 2
    $9.99 $7.99 20% off with code THANKU
    $11
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 2
    $18.99 $15.19 20% off with code THANKU
    29% off estimated retail
    Body Glove Rash Guard (view 2)Body Glove Rash Guard (view 1)
    View Product: Body Glove Rash Guard

    Body Glove

    Rash Guard
    Size 2
    $8.99 $7.19 20% off with code THANKU
    66% off estimated retail
    Radicool Rash Guard (view 2)Radicool Rash Guard (view 1)New With Tags
    View Product: Radicool Rash Guard

    Radicool

    Rash Guard
    Size 2
    $8.99 $7.19 20% off with code THANKU
    43% 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 2
    $8.99 $7.19 20% off with code THANKU
    59% off estimated retail
    Unbranded Rash Guard (view 2)Unbranded Rash Guard (view 1)
    View Product: Unbranded Rash Guard

    Unbranded

    Rash Guard
    Size 2
    $10.99 $8.79 20% off with code THANKU
    50% off estimated retail
    Little Peixoto Rash Guard (view 2)Little Peixoto Rash Guard (view 1)
    View Product: Little Peixoto Rash Guard

    Little Peixoto

    Rash Guard
    Size 2
    $16.99 $12.74 25% off with code THANKU
    61% off estimated retail
    Peixoto Two Piece Swimsuit (view 2)Peixoto Two Piece Swimsuit (view 1)
    View Product: Peixoto Two Piece Swimsuit

    Peixoto

    Two Piece Swimsuit
    Size 2
    $22.99 $18.39 20% off with code THANKU
    58% off estimated retail
    Peixoto Two Piece Swimsuit (view 2)Peixoto Two Piece Swimsuit (view 1)
    View Product: Peixoto Two Piece Swimsuit

    Peixoto

    Two Piece Swimsuit
    Size 2
    $20.99 $16.79 20% off with code THANKU
    61% off estimated retail
    Bloch One Piece Swimsuit (view 2)Bloch One Piece Swimsuit (view 1)
    View Product: Bloch One Piece Swimsuit

    Bloch

    One Piece Swimsuit
    Size 2
    $11.99 $8.99 25% off with code THANKU
    45% 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 2
    $18.99 $13.29 30% off with code THANKU
    53% off estimated retail
    Hunter Rash Guard (view 2)Hunter Rash Guard (view 1)
    View Product: Hunter Rash Guard

    Hunter

    Rash Guard
    Size 2
    $17.99 $14.39 20% off with code THANKU
    67% 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 2
    $12.99 $10.39 20% off with code THANKU
    40% off estimated retail
    Creamie One Piece Swimsuit (view 2)Creamie One Piece Swimsuit (view 1)
    View Product: Creamie One Piece Swimsuit

    Creamie

    One Piece Swimsuit
    Size 2
    $17.99 $13.49 25% off with code THANKU
    45% 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 2
    $12.99 $10.39 20% off with code THANKU
    66% off estimated retail
    Mud Pie One Piece Swimsuit (view 2)Mud Pie One Piece Swimsuit (view 1)
    View Product: Mud Pie One Piece Swimsuit

    Mud Pie

    One Piece Swimsuit
    Size 9-12 mo
    $11.99 $9.59 20% off with code THANKU
    45% off estimated retail
    Snapper Rock Wetsuit (view 2)Snapper Rock Wetsuit (view 1)
    View Product: Snapper Rock Wetsuit

    Snapper Rock

    Wetsuit
    Size 2
    $19.99 $14.99 25% off with code THANKU
    39% off estimated retail
    Tea One Piece Swimsuit (view 2)Tea One Piece Swimsuit (view 1)Price Drop
    View Product: Tea One Piece Swimsuit

    Tea

    One Piece Swimsuit
    Size 9-12 mo
    $18.99 $14.24 25% off with code THANKU
    60% 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 2
    $9.99 $7.99 20% off with code THANKU
    37% off estimated retail
    Les Tout Petits One Piece Swimsuit (view 2)Les Tout Petits One Piece Swimsuit (view 1)Price Drop
    View Product: Les Tout Petits One Piece Swimsuit

    Les Tout Petits

    One Piece Swimsuit
    Size 2
    $14.99 $11.24 25% off with code THANKU
    76% off estimated retail
    Crewcuts One Piece Swimsuit (view 2)Crewcuts One Piece Swimsuit (view 1)Price Drop
    View Product: Crewcuts One Piece Swimsuit

    Crewcuts

    One Piece Swimsuit
    Size 2
    $10.99 $8.79 20% off with code THANKU
    66% off estimated retail
    Little Peixoto Two Piece Swimsuit (view 2)Little Peixoto Two Piece Swimsuit (view 1)Price Drop
    View Product: Little Peixoto Two Piece Swimsuit

    Little Peixoto

    Two Piece Swimsuit
    Size 2
    $14.99 $11.24 25% off with code THANKU
    65% off estimated retail
    H&M One Piece Swimsuit (view 2)H&M One Piece Swimsuit (view 1)Price Drop
    View Product: H&M One Piece Swimsuit

    H&M

    One Piece Swimsuit
    Size 2
    $9.99 $7.99 20% off with code THANKU
    37% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)Price Drop
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 2
    $10.99 $8.79 20% off with code THANKU
    50% off estimated retail
    Beau Loves One Piece Swimsuit (view 2)Beau Loves One Piece Swimsuit (view 1)Price Drop
    View Product: Beau Loves One Piece Swimsuit

    Beau Loves

    One Piece Swimsuit
    Size 2
    $10.99 $8.79 20% off with code THANKU
    66% off estimated retail
    Tea One Piece Swimsuit (view 2)Tea One Piece Swimsuit (view 1)Price Drop
    View Product: Tea One Piece Swimsuit

    Tea

    One Piece Swimsuit
    Size 2
    $10.99 $8.24 25% off with code THANKU
    77% off estimated retail
    98 Coast Av. Two Piece Swimsuit (view 2)98 Coast Av. Two Piece Swimsuit (view 1)Price Drop
    View Product: 98 Coast Av. Two Piece Swimsuit

    98 Coast Av.

    Two Piece Swimsuit
    Size 2
    $10.99 $8.79 20% off with code THANKU
    83% off estimated retail
    Disney One Piece Swimsuit (view 2)Disney One Piece Swimsuit (view 1)Price Drop
    View Product: Disney One Piece Swimsuit

    Disney

    One Piece Swimsuit
    Size 9-12 mo
    $9.99 $7.99 20% off with code THANKU
    52% off estimated retail
    H&M One Piece Swimsuit (view 2)H&M One Piece Swimsuit (view 1)Price Drop
    View Product: H&M One Piece Swimsuit

    H&M

    One Piece Swimsuit
    Size 2
    $8.99 $7.19 20% off with code THANKU
    43% off estimated retail
    Unbranded Rash Guard (view 2)Unbranded Rash Guard (view 1)Price Drop
    View Product: Unbranded Rash Guard

    Unbranded

    Rash Guard
    Size 2
    $9.99 $7.99 20% off with code THANKU
    54% off estimated retail
    Disney One Piece Swimsuit (view 2)Disney One Piece Swimsuit (view 1)Price Drop
    View Product: Disney One Piece Swimsuit

    Disney

    One Piece Swimsuit
    Size 2
    $9.99 $7.99 20% off with code THANKU
    52% off estimated retail
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