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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.

184 items
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    Stella McCartney One Piece Swimsuit (view 2)Stella McCartney One Piece Swimsuit (view 1)
    View Product: Stella McCartney One Piece Swimsuit

    Stella McCartney

    One Piece Swimsuit
    Size 12 mo
    $38.99
    59% off estimated retail
    Gap One Piece Swimsuit (view 2)Gap One Piece Swimsuit (view 1)
    View Product: Gap One Piece Swimsuit

    Gap

    One Piece Swimsuit
    Size 12
    $17.99
    62% 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 Small kids
    $19.99
    37% 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 8
    $14.99
    60% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Bloch One Piece Swimsuit (view 2)Bloch One Piece Swimsuit (view 1)
    View Product: Bloch One Piece Swimsuit

    Bloch

    One Piece Swimsuit
    Size 12
    $13.99
    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 Large kids
    $11.99
    41% off estimated retail
    Jordan Two Piece Swimsuit (view 2)Jordan Two Piece Swimsuit (view 1)New With Tags
    View Product: Jordan Two Piece Swimsuit

    Jordan

    Two Piece Swimsuit
    Size 24 mo
    $13.99
    68% 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 24 mo
    $17.99
    50% 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 5T
    $20.99
    56% off estimated retail
    Radio Fiji One Piece Swimsuit (view 2)Radio Fiji One Piece Swimsuit (view 1)
    View Product: Radio Fiji One Piece Swimsuit

    Radio Fiji

    One Piece Swimsuit
    Size 16 Plus
    $18.99
    56% off estimated retail
    Disney Two Piece Swimsuit (view 2)Disney Two Piece Swimsuit (view 1)
    View Product: Disney Two Piece Swimsuit

    Disney

    Two Piece Swimsuit
    Size 5
    $12.99 $14
    The Children's Place One Piece Swimsuit (view 2)The Children's Place One Piece Swimsuit (view 1)
    View Product: The Children's Place One Piece Swimsuit

    The Children's Place

    One Piece Swimsuit
    Size 14
    $10.99
    52% 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 100 cm
    $30.99
    39% 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 14
    $12.99
    59% off estimated retail
    Disney Store Two Piece Swimsuit (view 2)Disney Store Two Piece Swimsuit (view 1)
    View Product: Disney Store Two Piece Swimsuit

    Disney Store

    Two Piece Swimsuit
    Size 2
    $9.99
    35% 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 10
    $12.99
    35% 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 6X
    $14.99
    60% off estimated retail
    ZeroXposur One Piece Swimsuit (view 2)ZeroXposur One Piece Swimsuit (view 1)
    View Product: ZeroXposur One Piece Swimsuit

    ZeroXposur

    One Piece Swimsuit
    Size 16
    $18.99
    53% off estimated retail
    Roxy Girl Rash Guard (view 2)Roxy Girl Rash Guard (view 1)
    View Product: Roxy Girl Rash Guard

    Roxy Girl

    Rash Guard
    Size 10
    $23.99
    58% off estimated retail
    O'Rageous Two Piece Swimsuit (view 2)O'Rageous Two Piece Swimsuit (view 1)
    View Product: O'Rageous Two Piece Swimsuit

    O'Rageous

    Two Piece Swimsuit
    Size 12
    $16.99
    32% off estimated retail
    Disney Rash Guard (view 2)Disney Rash Guard (view 1)New With Tags
    View Product: Disney Rash Guard

    Disney

    Rash Guard
    Size X-Large youth
    $15.99
    45% off estimated retail
    Athleta Board Shorts (view 2)Athleta Board Shorts (view 1)
    View Product: Athleta Board Shorts

    Athleta

    Board Shorts
    Size 12
    $21.99
    42% 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
    $24.99
    57% 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 5T
    $10.99
    44% off estimated retail
    SO Two Piece Swimsuit (view 2)SO Two Piece Swimsuit (view 1)
    View Product: SO Two Piece Swimsuit

    SO

    Two Piece Swimsuit
    Size 7
    $13.99
    44% 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 10
    $11.99
    40% 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 16
    $22.99
    40% off estimated retail
    Gerry One Piece Swimsuit (view 2)Gerry One Piece Swimsuit (view 1)
    View Product: Gerry One Piece Swimsuit

    Gerry

    One Piece Swimsuit
    Size 10
    $17.99
    45% 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 10
    $13.99
    25% off estimated retail
    Cat & Jack Rash Guard (view 2)Cat & Jack Rash Guard (view 1)Flawed Gem
    View Product: Cat & Jack Rash Guard

    Cat & Jack

    Rash Guard
    Size 6X
    $12.99
    35% off estimated retail
    InGear Rash Guard (view 2)InGear Rash Guard (view 1)
    View Product: InGear Rash Guard

    InGear

    Rash Guard
    Size Medium kids
    Assorted Brands Board Shorts (view 2)Assorted Brands Board Shorts (view 1)
    View Product: Assorted Brands Board Shorts

    Assorted Brands

    Board Shorts
    Size Large youth
    $15.99
    36% off estimated retail
    Pink One Piece Swimsuit (view 2)Pink One Piece Swimsuit (view 1)
    View Product: Pink One Piece Swimsuit

    Pink

    One Piece Swimsuit
    Size 2X-large kids
    Justice Rash Guard (view 2)Justice Rash Guard (view 1)
    View Product: Justice Rash Guard

    Justice

    Rash Guard
    Size X-Small kids
    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 X-Small kids
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