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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.

9-12 moRemove filter2TRemove filterIn Someone's CartRemove filter
83 items
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    The North Face Rash Guard (view 2)The North Face Rash Guard (view 1)
    View Product: The North Face Rash Guard

    The North Face

    Rash Guard
    Size 2T
    $16.99
    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
    $14.99
    31% off estimated retail
    OshKosh B'gosh Two Piece Swimsuit (view 2)OshKosh B'gosh Two Piece Swimsuit (view 1)
    View Product: OshKosh B'gosh Two Piece Swimsuit

    OshKosh B'gosh

    Two Piece Swimsuit
    Size 2T
    $9.99
    58% 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
    $9.99
    54% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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 2T
    $11.99 $11
    O'Neill Two Piece Swimsuit (view 2)O'Neill Two Piece Swimsuit (view 1)
    View Product: O'Neill Two Piece Swimsuit

    O'Neill

    Two Piece Swimsuit
    Size 2T
    $10.99
    50% 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 2T
    $9.99 $11
    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
    17% 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
    $19.99
    54% 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
    $15.99
    27% 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 2T
    $7.99
    38% off estimated retail
    Cocomelon One Piece Swimsuit (view 2)Cocomelon One Piece Swimsuit (view 1)
    View Product: Cocomelon One Piece Swimsuit

    Cocomelon

    One Piece Swimsuit
    Size 2T
    $11.99
    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 2T
    $13.99
    22% 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
    $18.99
    60% 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
    $16.99
    61% off estimated retail
    Tea Rash Guard (view 2)Tea Rash Guard (view 1)
    View Product: Tea Rash Guard

    Tea

    Rash Guard
    Size 9-12 mo
    $14.99
    44% 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 2T
    $9.99
    54% off estimated retail
    Disney Collection by Hanna Andersson One Piece Swimsuit (view 2)Disney Collection by Hanna Andersson One Piece Swimsuit (view 1)
    View Product: Disney Collection by Hanna Andersson One Piece Swimsuit

    Disney Collection by Hanna Andersson

    One Piece Swimsuit
    Size 2T
    $14.99
    44% off estimated retail
    Tommy Bahama One Piece Swimsuit (view 2)Tommy Bahama One Piece Swimsuit (view 1)
    View Product: Tommy Bahama One Piece Swimsuit

    Tommy Bahama

    One Piece Swimsuit
    Size 2T
    $11.99
    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
    $11.99
    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 2T
    $13.99
    17% 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
    $15.99
    55% 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
    $9.99
    16% off estimated retail
    Mud Pie One Piece Swimsuit (view 2)Mud Pie One Piece Swimsuit (view 1)
    View Product: Mud Pie One Piece Swimsuit

    Mud Pie

    One Piece Swimsuit
    Size 9-12 mo
    $9.99
    54% 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 2T
    $11.99
    33% off estimated retail
    Absorba Rash Guard (view 2)Absorba Rash Guard (view 1)
    View Product: Absorba Rash Guard

    Absorba

    Rash Guard
    Size 2T
    $7.99
    50% off estimated retail
    Op Rash Guard (view 2)Op Rash Guard (view 1)
    View Product: Op Rash Guard

    Op

    Rash Guard
    Size 2T
    $6.99
    36% off estimated retail
    OshKosh B'gosh Two Piece Swimsuit (view 2)OshKosh B'gosh Two Piece Swimsuit (view 1)
    View Product: OshKosh B'gosh Two Piece Swimsuit

    OshKosh B'gosh

    Two Piece Swimsuit
    Size 2T
    $13.99
    41% 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
    $11.99
    14% 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 9-12 mo
    $7.99
    38% 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
    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
    $13.99
    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
    $13.99 $11.19 20% off with code THANKU
    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
    $16.99 $12.74 25% off with code THANKU
    52% 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
    $14.99 $11.24 25% off with code THANKU
    44% 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 2T
    $10.99 $8.79 20% off with code THANKU
    21% off estimated retail
    Jump'n Splash Rash Guard (view 2)Jump'n Splash Rash Guard (view 1)
    View Product: Jump'n Splash Rash Guard

    Jump'n Splash

    Rash Guard
    Size 2T
    $8.99 $7.19 20% off with code THANKU
    43% off estimated retail
    Junk Food One Piece Swimsuit (view 2)Junk Food One Piece Swimsuit (view 1)
    View Product: Junk Food One Piece Swimsuit

    Junk Food

    One Piece Swimsuit
    Size 2T
    $9.99 $7.99 20% off with code THANKU
    63% 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
    $15.99 $11.19 30% off with code THANKU
    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
    $12.99 $10.39 20% off with code THANKU
    23% 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
    $16.99 $12.74 25% off with code THANKU
    59% off estimated retail
    Anko Baby Board Shorts (view 2)Anko Baby Board Shorts (view 1)
    View Product: Anko Baby Board Shorts

    Anko Baby

    Board Shorts
    Size 2T
    $9.99 $7.99 20% off with code THANKU
    33% 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
    $19.99 $14.99 25% off with code THANKU
    52% 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
    $14.99 $11.24 25% off with code THANKU
    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
    $18.99 $14.24 25% off with code THANKU
    29% 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
    $13.99 $11.19 20% off with code THANKU
    61% 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
    $10.99 $8.79 20% off with code THANKU
    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
    $19.99 $14.99 25% off with code THANKU
    52% off estimated retail
    Wave Zone One Piece Swimsuit (view 2)Wave Zone One Piece Swimsuit (view 1)
    View Product: Wave Zone One Piece Swimsuit

    Wave Zone

    One Piece Swimsuit
    Size 2T
    $11.99 $9.59 20% off with code THANKU
    $11
    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
    $10.99 $8.79 20% off with code THANKU
    $11
    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
    $9.99 $7.99 20% off with code THANKU
    61% off estimated retail
    Mud Pie One Piece Swimsuit (view 2)Mud Pie One Piece Swimsuit (view 1)
    View Product: Mud Pie One Piece Swimsuit

    Mud Pie

    One Piece Swimsuit
    Size 9-12 mo
    $11.99 $9.59 20% off with code THANKU
    45% off estimated retail
    Kanu Surf Board Shorts (view 2)Kanu Surf Board Shorts (view 1)
    View Product: Kanu Surf Board Shorts

    Kanu Surf

    Board Shorts
    Size 2T
    $7.99 $6.39 20% off with code THANKU
    46% off estimated retail
    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
    $12.99 $10.39 20% off with code THANKU
    38% off estimated retail
    Tea One Piece Swimsuit (view 2)Tea One Piece Swimsuit (view 1)Price Drop
    View Product: Tea One Piece Swimsuit

    Tea

    One Piece Swimsuit
    Size 9-12 mo
    $18.99 $14.24 25% off with code THANKU
    60% off estimated retail
    Old Navy Board Shorts (view 2)Old Navy Board Shorts (view 1)
    View Product: Old Navy Board Shorts

    Old Navy

    Board Shorts
    Size 2T
    $10.99 $8.79 20% off with code THANKU
    21% 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
    $14.99 $11.24 25% off with code THANKU
    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
    $11.99 $9.59 20% off with code THANKU
    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
    $16.99 $12.74 25% off with code THANKU
    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
    $12.99 $9.74 25% off with code THANKU
    40% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 2T
    $11.99 $9.59 20% off with code THANKU
    29% 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
    $17.99 $13.49 25% off with code THANKU
    50% off estimated retail
    Speedo Rash Guard (view 2)Speedo Rash Guard (view 1)
    View Product: Speedo Rash Guard

    Speedo

    Rash Guard
    Size 2T
    $9.99 $7.99 20% off with code THANKU
    37% 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
    $10.99 $8.79 20% off with code THANKU
    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
    $18.99 $13.29 30% off with code THANKU
    65% 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
    $11.99 $9.59 20% off with code THANKU
    55% off estimated retail
    Breakers One Piece Swimsuit (view 2)Breakers One Piece Swimsuit (view 1)Price Drop
    View Product: Breakers One Piece Swimsuit

    Breakers

    One Piece Swimsuit
    Size 2T
    $9.99 $7.99 20% off with code THANKU
    37% 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
    $13.99 $10.49 25% off with code THANKU
    48% off estimated retail
    Janie and Jack Swimsuit Cover Up (view 2)Janie and Jack Swimsuit Cover Up (view 1)Price Drop
    View Product: Janie and Jack Swimsuit Cover Up

    Janie and Jack

    Swimsuit Cover Up
    Size 2T
    $9.99 $7.49 25% off with code THANKU
    63% off estimated retail
    Kanu Surf One Piece Swimsuit (view 2)Kanu Surf One Piece Swimsuit (view 1)Price Drop
    View Product: Kanu Surf One Piece Swimsuit

    Kanu Surf

    One Piece Swimsuit
    Size 2T
    $9.99 $7.99 20% off with code THANKU
    54% 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
    $10.99 $8.79 20% off with code THANKU
    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
    $12.99 $9.74 25% off with code THANKU
    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
    $11.99 $8.99 25% off with code THANKU
    78% off estimated retail
    Floatimini Rash Guard (view 2)Floatimini Rash Guard (view 1)Price Drop
    View Product: Floatimini Rash Guard

    Floatimini

    Rash Guard
    Size 2T
    $9.99 $7.99 20% off with code THANKU
    81% 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 2T
    $9.99 $7.99 20% off with code THANKU
    44% off estimated retail
    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 9-12 mo
    $9.99 $7.99 20% off with code THANKU
    52% 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
    $8.99 $7.19 20% off with code THANKU
    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
    $9.99 $7.99 20% off with code THANKU
    71% off estimated retail
    Absorba Rash Guard (view 2)Absorba Rash Guard (view 1)Price Drop
    View Product: Absorba Rash Guard

    Absorba

    Rash Guard
    Size 2T
    $7.99 $6.39 20% off with code THANKU
    50% off estimated retail
    Cat & Jack One Piece Swimsuit (view 2)Cat & Jack One Piece Swimsuit (view 1)Price Drop
    View Product: Cat & Jack One Piece Swimsuit

    Cat & Jack

    One Piece Swimsuit
    Size 2T
    $9.99 $7.99 20% off with code THANKU
    41% 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
    $9.99 $7.99 20% off with code THANKU
    72% off estimated retail
    Charter Club Rash Guard (view 2)Charter Club Rash Guard (view 1)Price Drop
    View Product: Charter Club Rash Guard

    Charter Club

    Rash Guard
    Size 2T
    $8.99 $7.19 20% off with code THANKU
    18% 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
    $8.99 $7.19 20% off with code THANKU
    65% off estimated retail
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