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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.

$10 - $25Remove filterPreemieRemove filter2TRemove filter
52 items
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    Cat & Jack Wetsuit (view 2)Cat & Jack Wetsuit (view 1)
    View Product: Cat & Jack Wetsuit

    Cat & Jack

    Wetsuit
    Size 2T
    $14.99
    25% 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 2T
    $23.99
    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 2T
    $12.99
    23% 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
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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 2T
    $14.99
    58% 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
    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
    LoveShackFancy One Piece Swimsuit (view 2)LoveShackFancy One Piece Swimsuit (view 1)
    View Product: LoveShackFancy One Piece Swimsuit

    LoveShackFancy

    One Piece Swimsuit
    Size 2T
    $21.99
    78% off estimated retail
    Vineyard Vines One Piece Swimsuit (view 2)Vineyard Vines One Piece Swimsuit (view 1)
    View Product: Vineyard Vines One Piece Swimsuit

    Vineyard Vines

    One Piece Swimsuit
    Size 2T
    $12.99
    51% off estimated retail
    Carter's Wetsuit (view 2)Carter's Wetsuit (view 1)
    View Product: Carter's Wetsuit

    Carter's

    Wetsuit
    Size 2T
    $22.99
    56% off estimated retail
    Posh Peanut One Piece Swimsuit (view 2)Posh Peanut One Piece Swimsuit (view 1)
    View Product: Posh Peanut One Piece Swimsuit

    Posh Peanut

    One Piece Swimsuit
    Size 2T
    $21.99
    33% off estimated retail
    Carter's Wetsuit (view 2)Carter's Wetsuit (view 1)
    View Product: Carter's Wetsuit

    Carter's

    Wetsuit
    Size 2T
    $14.99
    42% 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 2T
    $12.99
    59% 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 2T
    $19.99
    44% 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
    Gymboree Two Piece Swimsuit (view 2)Gymboree Two Piece Swimsuit (view 1)
    View Product: Gymboree Two Piece Swimsuit

    Gymboree

    Two Piece Swimsuit
    Size 2T
    $22.99
    29% off estimated retail
    O'Neill Two Piece Swimsuit (view 2)O'Neill Two Piece Swimsuit (view 1)New With Tags
    View Product: O'Neill Two Piece Swimsuit

    O'Neill

    Two Piece Swimsuit
    Size 2T
    $20.99
    54% off estimated retail
    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 2T
    $26.99
    39% 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 2T
    $23.99 $16.79 30% off with code HOTDEAL
    52% 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 2T
    $18.99 $13.29 30% off with code HOTDEAL
    61% 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 2T
    $18.99 $13.29 30% off with code HOTDEAL
    61% off estimated retail
    Hope & Henry One Piece Swimsuit (view 2)Hope & Henry One Piece Swimsuit (view 1)
    View Product: Hope & Henry One Piece Swimsuit

    Hope & Henry

    One Piece Swimsuit
    Size 2T
    $17.99 $14.39 20% off with code HOTDEAL
    31% 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
    $15.99 $12.79 20% off with code HOTDEAL
    23% off estimated retail
    Sol Swim One Piece Swimsuit (view 2)Sol Swim One Piece Swimsuit (view 1)
    View Product: Sol Swim One Piece Swimsuit

    Sol Swim

    One Piece Swimsuit
    Size 2T
    $14.99 $11.99 20% off with code HOTDEAL
    36% off estimated retail
    Tea One Piece Swimsuit (view 2)Tea One Piece Swimsuit (view 1)
    View Product: Tea One Piece Swimsuit

    Tea

    One Piece Swimsuit
    Size 2T
    $20.99 $14.69 30% off with code HOTDEAL
    64% 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 2T
    $20.99 $15.74 25% off with code HOTDEAL
    61% 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 2T
    $18.99 $14.24 25% off with code HOTDEAL
    55% off estimated retail
    Hula Bay Rash Guard (view 2)Hula Bay Rash Guard (view 1)
    View Product: Hula Bay Rash Guard

    Hula Bay

    Rash Guard
    Size 2T
    $12.99 $9.74 25% off with code HOTDEAL
    14% 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 2T
    $22.99 $16.09 30% off with code HOTDEAL
    47% 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 2T
    $16.99 $13.59 20% off with code HOTDEAL
    36% off estimated retail
    405 South One Piece Swimsuit (view 2)405 South One Piece Swimsuit (view 1)
    View Product: 405 South One Piece Swimsuit

    405 South

    One Piece Swimsuit
    Size 2T
    $14.99 $10.49 30% off with code HOTDEAL
    48% 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 2T
    $18.99 $13.29 30% off with code HOTDEAL
    55% 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 $11.19 20% off with code HOTDEAL
    23% 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 2T
    $16.99 $12.74 25% off with code HOTDEAL
    40% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 2T
    $22.99 $18.39 20% off with code HOTDEAL
    29% 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 2T
    $12.99 $10.39 20% off with code HOTDEAL
    45% off estimated retail
    Janie and Jack Two Piece Swimsuit (view 2)Janie and Jack Two Piece Swimsuit (view 1)
    View Product: Janie and Jack Two Piece Swimsuit

    Janie and Jack

    Two Piece Swimsuit
    Size 2T
    $21.99 $16.49 25% off with code HOTDEAL
    52% 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 2T
    $12.99 $10.39 20% off with code HOTDEAL
    $11
    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 2T
    $15.99 $12.79 20% off with code HOTDEAL
    38% off estimated retail
    DVF for Baby Gap One Piece Swimsuit (view 2)DVF for Baby Gap One Piece Swimsuit (view 1)
    View Product: DVF for Baby Gap One Piece Swimsuit

    DVF for Baby Gap

    One Piece Swimsuit
    Size 2T
    $15.99 $10.39 35% off with code HOTDEAL
    54% off estimated retail
    Cat & Jack Two Piece Swimsuit (view 2)Cat & Jack Two Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack Two Piece Swimsuit

    Cat & Jack

    Two Piece Swimsuit
    Size 2T
    $13.99 $9.09 35% off with code HOTDEAL
    29% off estimated retail
    Gymboree One Piece Swimsuit (view 2)Gymboree One Piece Swimsuit (view 1)Price Drop
    View Product: Gymboree One Piece Swimsuit

    Gymboree

    One Piece Swimsuit
    Size 2T
    $20.99 $12.59 40% off with code HOTDEAL
    37% 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 2T
    $13.99 $9.09 35% off with code HOTDEAL
    40% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)Price Drop
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 2T
    $20.99 $11.54 45% off with code HOTDEAL
    52% off estimated retail
    KensieGirl One Piece Swimsuit (view 2)KensieGirl One Piece Swimsuit (view 1)Price Drop
    View Product: KensieGirl One Piece Swimsuit

    KensieGirl

    One Piece Swimsuit
    Size 2T
    $12.99 $7.79 40% off with code HOTDEAL
    59% off estimated retail
    Floatimini One Piece Swimsuit (view 2)Floatimini One Piece Swimsuit (view 1)Price Drop
    View Product: Floatimini One Piece Swimsuit

    Floatimini

    One Piece Swimsuit
    Size 2T
    $20.99 $10.50 50% off with code HOTDEAL
    67% off estimated retail
    Bathing Beauty Swimwear One Piece Swimsuit (view 2)Bathing Beauty Swimwear One Piece Swimsuit (view 1)Price Drop
    View Product: Bathing Beauty Swimwear One Piece Swimsuit

    Bathing Beauty Swimwear

    One Piece Swimsuit
    Size 2T
    $13.99 $8.39 40% off with code HOTDEAL
    59% 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 2T
    $12.99 $7.79 40% off with code HOTDEAL
    57% off estimated retail
    Floatimini One Piece Swimsuit (view 2)Floatimini One Piece Swimsuit (view 1)Price Drop
    View Product: Floatimini One Piece Swimsuit

    Floatimini

    One Piece Swimsuit
    Size 2T
    $19.99 $10.99 45% off with code HOTDEAL
    76% off estimated retail
    Floatimini One Piece Swimsuit (view 2)Floatimini One Piece Swimsuit (view 1)Price Drop
    View Product: Floatimini One Piece Swimsuit

    Floatimini

    One Piece Swimsuit
    Size 2T
    $13.99 $7.69 45% off with code HOTDEAL
    78% off estimated retail
    Carter's One Piece Swimsuit (view 2)Carter's One Piece Swimsuit (view 1)Price Drop
    View Product: Carter's One Piece Swimsuit

    Carter's

    One Piece Swimsuit
    Size 2T
    $13.99 $8.39 40% off with code HOTDEAL
    75% off estimated retail
    Assorted Brands Two Piece Swimsuit (view 2)Assorted Brands Two Piece Swimsuit (view 1)Price Drop
    View Product: Assorted Brands Two Piece Swimsuit

    Assorted Brands

    Two Piece Swimsuit
    Size 2T
    $13.24 $7.94 40% off with code HOTDEAL
    71% off estimated retail
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