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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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60 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 8
    $16.99
    32% 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
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 3T
    $11.99 $12
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Disney One Piece Swimsuit (view 2)Disney One Piece Swimsuit (view 1)
    View Product: Disney One Piece Swimsuit

    Disney

    One Piece Swimsuit
    Size 4T
    $15.99
    38% off estimated retail
    Assorted Brands Wetsuit (view 2)Assorted Brands Wetsuit (view 1)
    View Product: Assorted Brands Wetsuit

    Assorted Brands

    Wetsuit
    Size 6-9 mo
    $16.99
    61% off estimated retail
    Mini Boden One Piece Swimsuit (view 2)Mini Boden One Piece Swimsuit (view 1)
    View Product: Mini Boden One Piece Swimsuit

    Mini Boden

    One Piece Swimsuit
    Size 5
    $17.99
    40% off estimated retail
    Ruffle Butts One Piece Swimsuit (view 2)Ruffle Butts One Piece Swimsuit (view 1)
    View Product: Ruffle Butts One Piece Swimsuit

    Ruffle Butts

    One Piece Swimsuit
    Size 6-12 mo
    $8.99
    18% 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
    $17.99
    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
    $23.99
    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
    $11.99
    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
    $7.99
    27% 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 10
    $10.99
    45% off estimated retail
    Vineyard Vines Performance Rash Guard (view 2)Vineyard Vines Performance Rash Guard (view 1)
    View Product: Vineyard Vines Performance Rash Guard

    Vineyard Vines Performance

    Rash Guard
    Size X-Small kids
    $18.99
    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
    $14.99
    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
    $10.99
    45% 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 10
    $22.99
    53% off estimated retail
    Ruffle Butts One Piece Swimsuit (view 2)Ruffle Butts One Piece Swimsuit (view 1)
    View Product: Ruffle Butts One Piece Swimsuit

    Ruffle Butts

    One Piece Swimsuit
    Size 5
    $8.99
    35% 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
    $9.99
    69% off estimated retail
    Lili Gaufrette One Piece Swimsuit (view 2)Lili Gaufrette One Piece Swimsuit (view 1)
    View Product: Lili Gaufrette One Piece Swimsuit

    Lili Gaufrette

    One Piece Swimsuit
    Size 10
    $14.99
    84% 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 2T
    $25.99
    36% 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
    47% 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
    $18.99
    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
    $15.99
    51% 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 5
    $19.99
    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
    $16.99
    69% 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 4
    $12.99
    58% off estimated retail
    Athleta Rash Guard (view 2)Athleta Rash Guard (view 1)
    View Product: Athleta Rash Guard

    Athleta

    Rash Guard
    Size Large kids
    $22.99
    53% 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
    $11.99
    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
    $13.99
    57% 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
    $12.99
    64% 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
    $9.99
    41% 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
    $14.99
    54% off estimated retail
    Melissa Odabash One Piece Swimsuit (view 2)Melissa Odabash One Piece Swimsuit (view 1)
    View Product: Melissa Odabash One Piece Swimsuit

    Melissa Odabash

    One Piece Swimsuit
    Size 10
    $30.99
    62% off estimated retail
    Crewcuts Two Piece Swimsuit (view 2)Crewcuts Two Piece Swimsuit (view 1)
    View Product: Crewcuts Two Piece Swimsuit

    Crewcuts

    Two Piece Swimsuit
    Size 6
    $19.99
    59% 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
    $9.99
    41% off estimated retail
    O'Rageous Board Shorts (view 2)O'Rageous Board Shorts (view 1)
    View Product: O'Rageous Board Shorts

    O'Rageous

    Board Shorts
    Size Large kids
    $9.99
    60% off estimated retail
    Gymboree Rash Guard (view 2)Gymboree Rash Guard (view 1)New With Tags
    View Product: Gymboree Rash Guard

    Gymboree

    Rash Guard
    Size 10
    $9.99
    59% 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 4
    $12.99
    23% 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 150 cm
    $15.99
    51% off estimated retail
    Roxy Wetsuit (view 2)Roxy Wetsuit (view 1)
    View Product: Roxy Wetsuit

    Roxy

    Wetsuit
    Size 16
    $33.99
    58% 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 7
    $17.99
    56% 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 Large kids
    $10.99
    35% 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 X-Large kids
    $11.99
    63% 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 14
    $26.99
    55% 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
    $16.99
    48% off estimated retail
    Gymboree Rash Guard (view 2)Gymboree Rash Guard (view 1)
    View Product: Gymboree Rash Guard

    Gymboree

    Rash Guard
    Size 3T
    $13.99
    39% off estimated retail
    Polo by Ralph Lauren One Piece Swimsuit (view 2)Polo by Ralph Lauren One Piece Swimsuit (view 1)
    View Product: Polo by Ralph Lauren One Piece Swimsuit

    Polo by Ralph Lauren

    One Piece Swimsuit
    Size 2T
    $15.99
    72% off estimated retail
    Gymboree Two Piece Swimsuit (view 2)Gymboree Two Piece Swimsuit (view 1)
    View Product: Gymboree Two Piece Swimsuit

    Gymboree

    Two Piece Swimsuit
    Size 18-24 mo
    $18.99
    29% 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 Small kids
    $10.99
    35% 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
    $10.99
    50% off estimated retail
    Zone One One Piece Swimsuit (view 2)Zone One One Piece Swimsuit (view 1)
    View Product: Zone One One Piece Swimsuit

    Zone One

    One Piece Swimsuit
    Size Medium youth
    $12.99
    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 6 mo
    $13.99
    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
    $12.99
    23% off estimated retail
    Snapper Rock Rash Guard (view 2)Snapper Rock Rash Guard (view 1)
    View Product: Snapper Rock Rash Guard

    Snapper Rock

    Rash Guard
    Size 3
    $10.99
    45% off estimated retail
    Snapper Rock Rash Guard (view 2)Snapper Rock Rash Guard (view 1)
    View Product: Snapper Rock Rash Guard

    Snapper Rock

    Rash Guard
    Size 3
    $11.99
    40% off estimated retail
    Carter's Wetsuit (view 2)Carter's Wetsuit (view 1)
    View Product: Carter's Wetsuit

    Carter's

    Wetsuit
    Size 2T
    $23.99
    45% off estimated retail
    Assorted Brands Two Piece Swimsuit (view 2)Assorted Brands Two Piece Swimsuit (view 1)
    View Product: Assorted Brands Two Piece Swimsuit

    Assorted Brands

    Two Piece Swimsuit
    Size 9
    $12.99
    60% off estimated retail
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