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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.

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56 items
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    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 5
    $12.99
    35% off estimated retail
    Tropic Sun Two Piece Swimsuit (view 2)Tropic Sun Two Piece Swimsuit (view 1)
    View Product: Tropic Sun Two Piece Swimsuit

    Tropic Sun

    Two Piece Swimsuit
    Size 6X
    $9.99
    37% off estimated retail
    B.B. Collections One Piece Swimsuit (view 2)B.B. Collections One Piece Swimsuit (view 1)
    View Product: B.B. Collections One Piece Swimsuit

    B.B. Collections

    One Piece Swimsuit
    Size 5
    $12.99
    35% 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 6X
    $10.99
    45% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Baby Gap Rash Guard (view 2)Baby Gap Rash Guard (view 1)
    View Product: Baby Gap Rash Guard

    Baby Gap

    Rash Guard
    Size 12-18 mo
    $12.99
    38% off estimated retail
    Cabana Life Two Piece Swimsuit (view 2)Cabana Life Two Piece Swimsuit (view 1)
    View Product: Cabana Life Two Piece Swimsuit

    Cabana Life

    Two Piece Swimsuit
    Size 6X
    $26.99
    58% off estimated retail
    Crazy Shirts Board Shorts (view 2)Crazy Shirts Board Shorts (view 1)New With Tags
    View Product: Crazy Shirts Board Shorts

    Crazy Shirts

    Board Shorts
    Size 5
    $18.99
    54% 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 5
    $9.99 $7.99 20% off with code THANKU
    63% 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
    $13.99 $11.19 20% off with code THANKU
    17% off estimated retail
    Boardies Apparel Board Shorts (view 2)Boardies Apparel Board Shorts (view 1)
    View Product: Boardies Apparel Board Shorts

    Boardies Apparel

    Board Shorts
    Size 5
    $12.99 $10.39 20% off with code THANKU
    63% off estimated retail
    Zara Baby One Piece Swimsuit (view 2)Zara Baby One Piece Swimsuit (view 1)
    View Product: Zara Baby One Piece Swimsuit

    Zara Baby

    One Piece Swimsuit
    Size 5
    $12.99 $9.74 25% off with code THANKU
    51% 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 5
    $11.99 $9.59 20% off with code THANKU
    40% 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
    $12.99 $10.39 20% off with code THANKU
    23% 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 6X
    $13.99 $11.19 20% off with code THANKU
    64% off estimated retail
    Boden Rash Guard (view 2)Boden Rash Guard (view 1)
    View Product: Boden Rash Guard

    Boden

    Rash Guard
    Size 5
    $16.99 $12.74 25% off with code THANKU
    58% off estimated retail
    Janie and Jack Rash Guard (view 2)Janie and Jack Rash Guard (view 1)
    View Product: Janie and Jack Rash Guard

    Janie and Jack

    Rash Guard
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    71% off estimated retail
    Penelope Mack One Piece Swimsuit (view 2)Penelope Mack One Piece Swimsuit (view 1)
    View Product: Penelope Mack One Piece Swimsuit

    Penelope Mack

    One Piece Swimsuit
    Size 5
    $10.99 $8.79 20% off with code THANKU
    59% off estimated retail
    Baby Gap Board Shorts (view 2)Baby Gap Board Shorts (view 1)
    View Product: Baby Gap Board Shorts

    Baby Gap

    Board Shorts
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    57% off estimated retail
    Janie and Jack One Piece Swimsuit (view 2)Janie and Jack One Piece Swimsuit (view 1)
    View Product: Janie and Jack One Piece Swimsuit

    Janie and Jack

    One Piece Swimsuit
    Size 12-18 mo
    $14.99 $11.24 25% off with code THANKU
    64% off estimated retail
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 18
    $12.99 $10.39 20% off with code THANKU
    48% off estimated retail
    Ruffle Butts Rash Guard (view 2)Ruffle Butts Rash Guard (view 1)
    View Product: Ruffle Butts Rash Guard

    Ruffle Butts

    Rash Guard
    Size 5
    $8.99 $7.19 20% off with code THANKU
    35% 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 12-18 mo
    $12.99 $10.39 20% off with code THANKU
    51% 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 18
    $12.99 $10.39 20% off with code THANKU
    48% 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 5
    $14.99 $10.49 30% off with code THANKU
    48% off estimated retail
    Roller Rabbit One Piece Swimsuit (view 2)Roller Rabbit One Piece Swimsuit (view 1)
    View Product: Roller Rabbit One Piece Swimsuit

    Roller Rabbit

    One Piece Swimsuit
    Size 12-18 mo
    $23.99 $17.99 25% off with code THANKU
    45% 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 12-18 mo
    $10.99 $8.79 20% off with code THANKU
    38% off estimated retail
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)Price Drop
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 6X
    $8.99 $7.19 20% off with code THANKU
    55% 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 18
    $9.99 $7.99 20% off with code THANKU
    37% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)Price Drop
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 5
    $15.99 $12.79 20% off with code THANKU
    40% off estimated retail
    Lands' End Rash Guard (view 2)Lands' End Rash Guard (view 1)Price Drop
    View Product: Lands' End Rash Guard

    Lands' End

    Rash Guard
    Size 18
    $13.99 $10.49 25% off with code THANKU
    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 18
    $12.99 $10.39 20% off with code THANKU
    48% off estimated retail
    Disney for Baby Gap Board Shorts (view 2)Disney for Baby Gap Board Shorts (view 1)
    View Product: Disney for Baby Gap Board Shorts

    Disney for Baby Gap

    Board Shorts
    Size 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    33% off estimated retail
    Motion Wear One Piece Swimsuit (view 2)Motion Wear One Piece Swimsuit (view 1)Price Drop
    View Product: Motion Wear One Piece Swimsuit

    Motion Wear

    One Piece Swimsuit
    Size 6X
    $17.99 $14.39 20% off with code THANKU
    56% off estimated retail
    Old Navy One Piece Swimsuit (view 2)Old Navy One Piece Swimsuit (view 1)Price Drop
    View Product: Old Navy One Piece Swimsuit

    Old Navy

    One Piece Swimsuit
    Size 12-18 mo
    $11.99 $9.59 20% off with code THANKU
    33% off estimated retail
    Roller Rabbit Rash Guard (view 2)Roller Rabbit Rash Guard (view 1)Price Drop
    View Product: Roller Rabbit Rash Guard

    Roller Rabbit

    Rash Guard
    Size 6X
    $20.99 $15.74 25% off with code THANKU
    67% 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 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    63% off estimated retail
    Wonder Nation One Piece Swimsuit (view 2)Wonder Nation One Piece Swimsuit (view 1)Price Drop
    View Product: Wonder Nation One Piece Swimsuit

    Wonder Nation

    One Piece Swimsuit
    Size 18
    $10.99 $8.79 20% off with code THANKU
    31% off estimated retail
    Unbranded Rash Guard (view 2)Unbranded Rash Guard (view 1)Price Drop
    View Product: Unbranded Rash Guard

    Unbranded

    Rash Guard
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    59% off estimated retail
    Old Navy Two Piece Swimsuit (view 2)Old Navy Two Piece Swimsuit (view 1)Price Drop
    View Product: Old Navy Two Piece Swimsuit

    Old Navy

    Two Piece Swimsuit
    Size 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    44% off estimated retail
    Peek Rash Guard (view 2)Peek Rash Guard (view 1)Price Drop
    View Product: Peek Rash Guard

    Peek

    Rash Guard
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    66% off estimated retail
    UV Skinz Rash Guard (view 2)UV Skinz Rash Guard (view 1)Price Drop
    View Product: UV Skinz Rash Guard

    UV Skinz

    Rash Guard
    Size 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    63% off estimated retail
    Max Grey One Piece Swimsuit (view 2)Max Grey One Piece Swimsuit (view 1)Price Drop
    View Product: Max Grey One Piece Swimsuit

    Max Grey

    One Piece Swimsuit
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    18% off estimated retail
    Baby Gap Outlet One Piece Swimsuit (view 2)Baby Gap Outlet One Piece Swimsuit (view 1)Price Drop
    View Product: Baby Gap Outlet One Piece Swimsuit

    Baby Gap Outlet

    One Piece Swimsuit
    Size 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    $11
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)Price Drop
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 6X
    $9.99 $7.99 20% off with code THANKU
    50% off estimated retail
    Coolibar Rash Guard (view 2)Coolibar Rash Guard (view 1)Price Drop
    View Product: Coolibar Rash Guard

    Coolibar

    Rash Guard
    Size 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    69% off estimated retail
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)Price Drop
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    65% off estimated retail
    Janie and Jack Rash Guard (view 2)Janie and Jack Rash Guard (view 1)Price Drop
    View Product: Janie and Jack Rash Guard

    Janie and Jack

    Rash Guard
    Size 12-18 mo
    $9.99 $7.99 20% off with code THANKU
    67% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)Price Drop
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    59% off estimated retail
    Koala Kids One Piece Swimsuit (view 2)Koala Kids One Piece Swimsuit (view 1)Price Drop
    View Product: Koala Kids One Piece Swimsuit

    Koala Kids

    One Piece Swimsuit
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    10% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)Price Drop
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 12-18 mo
    $7.99 $6.39 20% off with code THANKU
    60% off estimated retail
    Carter's Rash Guard (view 2)Carter's Rash Guard (view 1)Price Drop
    View Product: Carter's Rash Guard

    Carter's

    Rash Guard
    Size 6X
    $9.99 $7.99 20% off with code THANKU
    66% off estimated retail
    Assorted Brands One Piece Swimsuit (view 2)Assorted Brands One Piece Swimsuit (view 1)Price Drop
    View Product: Assorted Brands One Piece Swimsuit

    Assorted Brands

    One Piece Swimsuit
    Size 12-18 mo
    $7.99 $6.39 20% off with code THANKU
    63% off estimated retail
    Old Navy One Piece Swimsuit (view 2)Old Navy One Piece Swimsuit (view 1)Price Drop
    View Product: Old Navy One Piece Swimsuit

    Old Navy

    One Piece Swimsuit
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    50% 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 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    40% off estimated retail
    UV Skinz Rash Guard (view 2)UV Skinz Rash Guard (view 1)Price Drop
    View Product: UV Skinz Rash Guard

    UV Skinz

    Rash Guard
    Size 12-18 mo
    $8.99 $7.19 20% off with code THANKU
    65% 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 12-18 mo
    $7.99 $6.39 20% off with code THANKU
    60% off estimated retail
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