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Shop Women's Swimwear at up to 90% off estimated retail! thredUP has a huge selection of gently used women's swimwear. Find bikinis, one-pieces, board shorts and cover ups from brands like Seafolly, Aqua or Speedo at thredUP.

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67 items
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    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $23.99
    59% off estimated retail
    Coolibar Rash Guard (view 2)Coolibar Rash Guard (view 1)
    View Product: Coolibar Rash Guard

    Coolibar

    Rash Guard
    Size XXS
    $24.99 $17.49 30% off with code THANKU
    67% off estimated retail
    Bleu Rod Beattie Swimsuit Top (view 2)Bleu Rod Beattie Swimsuit Top (view 1)Flawed Gem
    View Product: Bleu Rod Beattie Swimsuit Top

    Bleu Rod Beattie

    Swimsuit Top
    Size XXS
    $17.99 $13.49 25% off with code THANKU
    76% off estimated retail
    Calia by Carrie Underwood Swimsuit Bottoms (view 2)Calia by Carrie Underwood Swimsuit Bottoms (view 1)New With Tags
    View Product: Calia by Carrie Underwood Swimsuit Bottoms

    Calia by Carrie Underwood

    Swimsuit Bottoms
    Size XXS
    $19.99 $13.99 30% off with code THANKU
    42% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Lovewave Swimsuit Bottoms (view 2)Lovewave Swimsuit Bottoms (view 1)New With Tags
    View Product: Lovewave Swimsuit Bottoms

    Lovewave

    Swimsuit Bottoms
    Size XXS
    $25.99 $15.59 40% off with code THANKU
    70% off estimated retail
    Lovewave Swimsuit Bottoms (view 2)Lovewave Swimsuit Bottoms (view 1)New With Tags
    View Product: Lovewave Swimsuit Bottoms

    Lovewave

    Swimsuit Bottoms
    Size XXS
    $25.99 $15.59 40% off with code THANKU
    70% off estimated retail
    J.Crew Swimsuit Bottoms (view 2)J.Crew Swimsuit Bottoms (view 1)
    View Product: J.Crew Swimsuit Bottoms

    J.Crew

    Swimsuit Bottoms
    Size XXS
    $20.99 $14.69 30% off with code THANKU
    61% off estimated retail
    LA Hearts One Piece Swimsuit (view 2)LA Hearts One Piece Swimsuit (view 1)
    View Product: LA Hearts One Piece Swimsuit

    LA Hearts

    One Piece Swimsuit
    Size XXS
    $18.99 $14.24 25% off with code THANKU
    50% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $24.99 $16.24 35% off with code THANKU
    57% off estimated retail
    Athleta Swimsuit Bottoms (view 2)Athleta Swimsuit Bottoms (view 1)New With Tags
    View Product: Athleta Swimsuit Bottoms

    Athleta

    Swimsuit Bottoms
    Size XXS
    $20.99 $13.64 35% off with code THANKU
    61% off estimated retail
    Athleta Swimsuit Bottoms (view 2)Athleta Swimsuit Bottoms (view 1)New With Tags
    View Product: Athleta Swimsuit Bottoms

    Athleta

    Swimsuit Bottoms
    Size XXS
    $19.99 $13.99 30% off with code THANKU
    62% off estimated retail
    Wild Fable Swimsuit Top (view 2)Wild Fable Swimsuit Top (view 1)
    View Product: Wild Fable Swimsuit Top

    Wild Fable

    Swimsuit Top
    Size XXS
    $12.99 $9.74 25% off with code THANKU
    18% off estimated retail
    Roller Rabbit Swimsuit Cover Up (view 2)Roller Rabbit Swimsuit Cover Up (view 1)
    View Product: Roller Rabbit Swimsuit Cover Up

    Roller Rabbit

    Swimsuit Cover Up
    Size XXS
    $20.99 $14.69 30% off with code THANKU
    72% off estimated retail
    Madewell Madewell Second Wave Button-Front Bikini Top (view 2)Madewell Madewell Second Wave Button-Front Bikini Top (view 1)New With Tags
    View Product: Madewell Madewell Second Wave Button-Front Bikini Top

    Madewell

    Madewell Second Wave Button-Front Bikini Top
    Size XXS
    $26.99 $13.50 50% off with code THANKU
    57% off estimated retail
    Athleta Swimsuit Bottoms (view 2)Athleta Swimsuit Bottoms (view 1)
    View Product: Athleta Swimsuit Bottoms

    Athleta

    Swimsuit Bottoms
    Size XXS
    $24.99 $16.24 35% off with code THANKU
    57% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size XXS
    $12.99 $9.74 25% off with code THANKU
    48% off estimated retail
    Speedo Swimsuit Top (view 2)Speedo Swimsuit Top (view 1)
    View Product: Speedo Swimsuit Top

    Speedo

    Swimsuit Top
    Size XXS
    $12.99 $10.39 20% off with code THANKU
    48% off estimated retail
    Everlane Swimsuit Top (view 2)Everlane Swimsuit Top (view 1)
    View Product: Everlane Swimsuit Top

    Everlane

    Swimsuit Top
    Size XXS
    $25.99 $18.19 30% off with code THANKU
    59% off estimated retail
    J.Crew Swimsuit Bottoms (view 2)J.Crew Swimsuit Bottoms (view 1)
    View Product: J.Crew Swimsuit Bottoms

    J.Crew

    Swimsuit Bottoms
    Size XXS
    $16.99 $12.74 25% off with code THANKU
    69% off estimated retail
    Speedo Swimsuit Bottoms (view 2)Speedo Swimsuit Bottoms (view 1)New With Tags
    View Product: Speedo Swimsuit Bottoms

    Speedo

    Swimsuit Bottoms
    Size XXS
    $20.99 $15.74 25% off with code THANKU
    52% 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 XXS
    $26.99 $17.54 35% off with code THANKU
    66% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)New With Tags
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $25.99 $15.59 40% off with code THANKU
    55% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)New With Tags
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $25.99 $15.59 40% off with code THANKU
    55% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)New With Tags
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $23.99 $14.39 40% off with code THANKU
    59% off estimated retail
    J.Crew Swimsuit Top (view 2)J.Crew Swimsuit Top (view 1)
    View Product: J.Crew Swimsuit Top

    J.Crew

    Swimsuit Top
    Size XXS
    $23.99 $16.79 30% off with code THANKU
    65% off estimated retail
    Athleta Swimsuit Bottoms (view 2)Athleta Swimsuit Bottoms (view 1)
    View Product: Athleta Swimsuit Bottoms

    Athleta

    Swimsuit Bottoms
    Size XXS
    $24.99 $14.99 40% off with code THANKU
    57% off estimated retail
    Tommy Bahama Rash Guard (view 2)Tommy Bahama Rash Guard (view 1)
    View Product: Tommy Bahama Rash Guard

    Tommy Bahama

    Rash Guard
    Size XXS
    $20.99 $12.59 40% off with code THANKU
    63% off estimated retail
    JB Janela Bay Swimsuit Bottoms (view 2)JB Janela Bay Swimsuit Bottoms (view 1)
    View Product: JB Janela Bay Swimsuit Bottoms

    JB Janela Bay

    Swimsuit Bottoms
    Size XXS
    $17.99 $13.49 25% off with code THANKU
    52% off estimated retail
    Dolfin One Piece Swimsuit (view 2)Dolfin One Piece Swimsuit (view 1)New With Tags
    View Product: Dolfin One Piece Swimsuit

    Dolfin

    One Piece Swimsuit
    Size XXS
    $23.99 $15.59 35% off with code THANKU
    51% off estimated retail
    Carve Designs Swimsuit Top (view 2)Carve Designs Swimsuit Top (view 1)New With Tags
    View Product: Carve Designs Swimsuit Top

    Carve Designs

    Swimsuit Top
    Size XXS
    $21.99 $16.49 25% off with code THANKU
    66% off estimated retail
    I.AM.GIA One Piece Swimsuit (view 2)I.AM.GIA One Piece Swimsuit (view 1)
    View Product: I.AM.GIA One Piece Swimsuit

    I.AM.GIA

    One Piece Swimsuit
    Size XXS
    $23.99 $16.79 30% off with code THANKU
    68% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $25.99 $18.19 30% off with code THANKU
    55% off estimated retail
    Lilly Pulitzer Swimsuit Top (view 2)Lilly Pulitzer Swimsuit Top (view 1)
    View Product: Lilly Pulitzer Swimsuit Top

    Lilly Pulitzer

    Swimsuit Top
    Size XXS
    $21.99 $12.09 45% off with code THANKU
    71% 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 XXS
    $18.99 $13.29 30% off with code THANKU
    50% off estimated retail
    J.Crew Swimsuit Bottoms (view 2)J.Crew Swimsuit Bottoms (view 1)
    View Product: J.Crew Swimsuit Bottoms

    J.Crew

    Swimsuit Bottoms
    Size XXS
    $18.99 $13.29 30% off with code THANKU
    65% off estimated retail
    Vineyard Vines Swimsuit Bottoms (view 2)Vineyard Vines Swimsuit Bottoms (view 1)
    View Product: Vineyard Vines Swimsuit Bottoms

    Vineyard Vines

    Swimsuit Bottoms
    Size XXS
    $25.99 $16.89 35% off with code THANKU
    70% off estimated retail
    J.Crew Swimsuit Top (view 2)J.Crew Swimsuit Top (view 1)
    View Product: J.Crew Swimsuit Top

    J.Crew

    Swimsuit Top
    Size XXS
    $19.99 $13.99 30% off with code THANKU
    71% off estimated retail
    J.Crew Swimsuit Bottoms (view 2)J.Crew Swimsuit Bottoms (view 1)
    View Product: J.Crew Swimsuit Bottoms

    J.Crew

    Swimsuit Bottoms
    Size XXS
    $20.99 $14.69 30% off with code THANKU
    61% off estimated retail
    Patagonia Swimsuit Bottoms (view 2)Patagonia Swimsuit Bottoms (view 1)
    View Product: Patagonia Swimsuit Bottoms

    Patagonia

    Swimsuit Bottoms
    Size XXS
    $24.99 $13.74 45% off with code THANKU
    66% off estimated retail
    Zac Posen for Target Swimsuit Bottoms (view 2)Zac Posen for Target Swimsuit Bottoms (view 1)
    View Product: Zac Posen for Target Swimsuit Bottoms

    Zac Posen for Target

    Swimsuit Bottoms
    Size XXS
    $18.99 $15.19 20% off with code THANKU
    50% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $23.99 $16.79 30% off with code THANKU
    59% off estimated retail
    Modli Swimsuit Top (view 2)Modli Swimsuit Top (view 1)New With Tags
    View Product: Modli Swimsuit Top

    Modli

    Swimsuit Top
    Size XXS
    $14.99 $11.24 25% off with code THANKU
    62% off estimated retail
    Modli Swimsuit Top (view 2)Modli Swimsuit Top (view 1)New With Tags
    View Product: Modli Swimsuit Top

    Modli

    Swimsuit Top
    Size XXS
    $15.99 $11.99 25% off with code THANKU
    59% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $21.99 $15.39 30% off with code THANKU
    62% off estimated retail
    Assorted Brands Swimsuit Top (view 2)Assorted Brands Swimsuit Top (view 1)
    View Product: Assorted Brands Swimsuit Top

    Assorted Brands

    Swimsuit Top
    Size XXS
    $12.99 $8.44 35% off with code THANKU
    48% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $23.99 $16.79 30% off with code THANKU
    59% off estimated retail
    Gap One Piece Swimsuit (view 2)Gap One Piece Swimsuit (view 1)Price Drop
    View Product: Gap One Piece Swimsuit

    Gap

    One Piece Swimsuit
    Size XXS
    $26.99 $20.24 25% off with code THANKU
    66% off estimated retail
    Athleta Swimsuit Bottoms (view 2)Athleta Swimsuit Bottoms (view 1)Price Drop
    View Product: Athleta Swimsuit Bottoms

    Athleta

    Swimsuit Bottoms
    Size XXS
    $25.99 $18.19 30% off with code THANKU
    55% off estimated retail
    Lilly Pulitzer Swimsuit Top (view 2)Lilly Pulitzer Swimsuit Top (view 1)Price Drop
    View Product: Lilly Pulitzer Swimsuit Top

    Lilly Pulitzer

    Swimsuit Top
    Size XXS
    $24.99 $12.50 50% off with code THANKU
    67% off estimated retail
    Lilly Pulitzer Swimsuit Bottoms (view 2)Lilly Pulitzer Swimsuit Bottoms (view 1)
    View Product: Lilly Pulitzer Swimsuit Bottoms

    Lilly Pulitzer

    Swimsuit Bottoms
    Size XXS
    $14.99 $8.99 40% off with code THANKU
    80% off estimated retail
    Express One Eleven One Piece Swimsuit (view 2)Express One Eleven One Piece Swimsuit (view 1)Price Drop
    View Product: Express One Eleven One Piece Swimsuit

    Express One Eleven

    One Piece Swimsuit
    Size XXS
    $15.99 $11.99 25% off with code THANKU
    57% off estimated retail
    Athleta Swimsuit Cover Up (view 2)Athleta Swimsuit Cover Up (view 1)Price Drop
    View Product: Athleta Swimsuit Cover Up

    Athleta

    Swimsuit Cover Up
    Size XXS
    $22.99 $14.94 35% off with code THANKU
    61% off estimated retail
    J.Crew Swimsuit Cover Up (view 2)J.Crew Swimsuit Cover Up (view 1)Price Drop
    View Product: J.Crew Swimsuit Cover Up

    J.Crew

    Swimsuit Cover Up
    Size XXS
    $24.99 $16.24 35% off with code THANKU
    74% off estimated retail
    motionwear One Piece Swimsuit (view 2)motionwear One Piece Swimsuit (view 1)Price Drop
    View Product: motionwear One Piece Swimsuit

    motionwear

    One Piece Swimsuit
    Size XXS
    $16.99 $11.89 30% off with code THANKU
    55% off estimated retail
    Athleta Swimsuit Bottoms (view 2)Athleta Swimsuit Bottoms (view 1)Price Drop
    View Product: Athleta Swimsuit Bottoms

    Athleta

    Swimsuit Bottoms
    Size XXS
    $24.99 $17.49 30% off with code THANKU
    57% off estimated retail
    PacSun Swimsuit Top (view 2)PacSun Swimsuit Top (view 1)New With Tags
    View Product: PacSun Swimsuit Top

    PacSun

    Swimsuit Top
    Size XXS
    $17.99 $12.59 30% off with code THANKU
    45% off estimated retail
    House of Harlow 1960 Swimsuit Bottoms (view 2)House of Harlow 1960 Swimsuit Bottoms (view 1)New With Tags
    View Product: House of Harlow 1960 Swimsuit Bottoms

    House of Harlow 1960

    Swimsuit Bottoms
    Size XXS
    $20.99 $14.69 30% off with code THANKU
    79% off estimated retail
    Calia by Carrie Underwood Swimsuit Bottoms (view 2)Calia by Carrie Underwood Swimsuit Bottoms (view 1)Price Drop
    View Product: Calia by Carrie Underwood Swimsuit Bottoms

    Calia by Carrie Underwood

    Swimsuit Bottoms
    Size XXS
    $17.99 $13.49 25% off with code THANKU
    43% 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 XXS
    $22.99 $14.94 35% off with code THANKU
    75% off estimated retail
    J.Crew Swimsuit Top (view 2)J.Crew Swimsuit Top (view 1)Price Drop
    View Product: J.Crew Swimsuit Top

    J.Crew

    Swimsuit Top
    Size XXS
    $13.99 $9.79 30% off with code THANKU
    81% off estimated retail
    Tularosa Swimsuit Top (view 2)Tularosa Swimsuit Top (view 1)Price Drop
    View Product: Tularosa Swimsuit Top

    Tularosa

    Swimsuit Top
    Size XXS
    $12.99 $9.09 30% off with code THANKU
    82% off estimated retail
    Assorted Brands Swimsuit Cover Up (view 2)Assorted Brands Swimsuit Cover Up (view 1)Price Drop
    View Product: Assorted Brands Swimsuit Cover Up

    Assorted Brands

    Swimsuit Cover Up
    Size XXS
    $12.99 $9.74 25% off with code THANKU
    65% off estimated retail
    Athleta Swimsuit Bottom (view 2)Athleta Swimsuit Bottom (view 1)Price Drop
    View Product: Athleta Swimsuit Bottom

    Athleta

    Swimsuit Bottom
    Size XXS
    $13.99 $10.49 25% off with code THANKU
    76% off estimated retail
    J.Crew Swimsuit Bottoms (view 2)J.Crew Swimsuit Bottoms (view 1)Price Drop
    View Product: J.Crew Swimsuit Bottoms

    J.Crew

    Swimsuit Bottoms
    Size XXS
    $12.99 $9.09 30% off with code THANKU
    77% off estimated retail
    J.Crew Rash Guard (view 2)J.Crew Rash Guard (view 1)Price Drop
    View Product: J.Crew Rash Guard

    J.Crew

    Rash Guard
    Size XXS
    $15.99 $11.19 30% off with code THANKU
    82% off estimated retail
    Athleta Swimsuit Top (view 2)Athleta Swimsuit Top (view 1)Price Drop
    View Product: Athleta Swimsuit Top

    Athleta

    Swimsuit Top
    Size XXS
    $12.99 $9.74 25% off with code THANKU
    77% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)Price Drop
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size XXS
    $17.99 $13.49 25% off with code THANKU
    75% off estimated retail
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