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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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38 items
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    Little Me Two Piece Swimsuit (view 2)Little Me Two Piece Swimsuit (view 1)
    View Product: Little Me Two Piece Swimsuit

    Little Me

    Two Piece Swimsuit
    Size 4T
    $12.99
    60% 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 4T
    $13.99
    64% off estimated retail
    Mud Pie One Piece Swimsuit (view 2)Mud Pie One Piece Swimsuit (view 1)New With Tags
    View Product: Mud Pie One Piece Swimsuit

    Mud Pie

    One Piece Swimsuit
    Size 4T
    $24.99
    47% 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 4T
    $12.99
    23% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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 4T
    $13.99
    48% off estimated retail
    Kanu Surf One Piece Swimsuit (view 2)Kanu Surf One Piece Swimsuit (view 1)
    View Product: Kanu Surf One Piece Swimsuit

    Kanu Surf

    One Piece Swimsuit
    Size 4T
    $14.99
    44% off estimated retail
    Unbranded Rash Guard (view 2)Unbranded Rash Guard (view 1)
    View Product: Unbranded Rash Guard

    Unbranded

    Rash Guard
    Size 4T
    $10.99
    38% off estimated retail
    Dolfin One Piece Swimsuit (view 2)Dolfin One Piece Swimsuit (view 1)
    View Product: Dolfin One Piece Swimsuit

    Dolfin

    One Piece Swimsuit
    Size 4T
    $12.99
    23% off estimated retail
    Little Rhona One Piece Swimsuit (view 2)Little Rhona One Piece Swimsuit (view 1)
    View Product: Little Rhona One Piece Swimsuit

    Little Rhona

    One Piece Swimsuit
    Size 4T
    $30.99
    62% 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 4T
    $10.99
    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 4T
    $9.99
    41% 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 4T
    $11.99
    29% 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 4T
    $11.99 $13
    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 4T
    $10.99 $8.79 20% off with code THANKU
    38% off estimated retail
    Limited Too Two Piece Swimsuit (view 2)Limited Too Two Piece Swimsuit (view 1)
    View Product: Limited Too Two Piece Swimsuit

    Limited Too

    Two Piece Swimsuit
    Size 4T
    $9.99 $7.99 20% off with code THANKU
    63% 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 4T
    $10.99 $8.79 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 4T
    $12.99 $10.39 20% off with code THANKU
    23% off estimated retail
    Baby Gap Two Piece Swimsuit (view 2)Baby Gap Two Piece Swimsuit (view 1)
    View Product: Baby Gap Two Piece Swimsuit

    Baby Gap

    Two Piece Swimsuit
    Size 4T
    $15.99 $11.99 25% off with code THANKU
    40% 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 4T
    $8.99 $7.19 20% off with code THANKU
    25% 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 4T
    $8.99 $7.19 20% off with code THANKU
    25% off estimated retail
    Hula Star Two Piece Swimsuit (view 2)Hula Star Two Piece Swimsuit (view 1)
    View Product: Hula Star Two Piece Swimsuit

    Hula Star

    Two Piece Swimsuit
    Size 4T
    $11.99 $9.59 20% off with code THANKU
    40% 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 4T
    $10.99 $8.79 20% off with code THANKU
    38% off estimated retail
    SwimZip Rash Guard (view 2)SwimZip Rash Guard (view 1)
    View Product: SwimZip Rash Guard

    SwimZip

    Rash Guard
    Size 4T
    $15.99
    40% 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 4T
    $12.99 $10.39 20% off with code THANKU
    61% off estimated retail
    Gymboree Rash Guard (view 2)Gymboree Rash Guard (view 1)
    View Product: Gymboree Rash Guard

    Gymboree

    Rash Guard
    Size 4T
    $14.99 $11.99 20% off with code THANKU
    34% 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 4T
    $9.99 $7.99 20% off with code THANKU
    41% 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 4T
    $10.99 $8.79 20% off with code THANKU
    38% off estimated retail
    Floatimini One Piece Swimsuit (view 2)Floatimini One Piece Swimsuit (view 1)
    View Product: Floatimini One Piece Swimsuit

    Floatimini

    One Piece Swimsuit
    Size 4T
    $18.99 $14.24 25% off with code THANKU
    72% 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 4T
    $15.99 $11.99 25% off with code THANKU
    59% off estimated retail
    Floatimini Rash Guard (view 2)Floatimini Rash Guard (view 1)
    View Product: Floatimini Rash Guard

    Floatimini

    Rash Guard
    Size 4T
    $22.99 $16.09 30% off with code THANKU
    66% off estimated retail
    Gymboree Rash Guard (view 2)Gymboree Rash Guard (view 1)
    View Product: Gymboree Rash Guard

    Gymboree

    Rash Guard
    Size 4T
    $11.99 $9.59 20% off with code THANKU
    47% 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 4T
    $15.99 $11.99 25% off with code THANKU
    52% off estimated retail
    Penelope Mack One Piece Swimsuit (view 2)Penelope Mack One Piece Swimsuit (view 1)Price Drop
    View Product: Penelope Mack One Piece Swimsuit

    Penelope Mack

    One Piece Swimsuit
    Size 4T
    $15.99 $12.79 20% off with code THANKU
    40% 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 4T
    $10.99 $8.79 20% off with code THANKU
    59% off estimated retail
    Floatimini Rash Guard (view 2)Floatimini Rash Guard (view 1)Price Drop
    View Product: Floatimini Rash Guard

    Floatimini

    Rash Guard
    Size 4T
    $18.99 $13.29 30% off with code THANKU
    72% off estimated retail
    Circo One Piece Swimsuit (view 2)Circo One Piece Swimsuit (view 1)Price Drop
    View Product: Circo One Piece Swimsuit

    Circo

    One Piece Swimsuit
    Size 4T
    $9.99 $7.99 20% off with code THANKU
    28% 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 4T
    $9.99 $7.99 20% off with code THANKU
    60% off estimated retail
    Assorted Brands Rash Guard (view 2)Assorted Brands Rash Guard (view 1)Price Drop
    View Product: Assorted Brands Rash Guard

    Assorted Brands

    Rash Guard
    Size 4T
    $9.99 $7.99 20% off with code THANKU
    63% off estimated retail
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