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.

393 items
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    Cupshe One Piece Swimsuit (view 2)Cupshe One Piece Swimsuit (view 1)
    View Product: Cupshe One Piece Swimsuit

    Cupshe

    One Piece Swimsuit
    Size 0X Plus
    $20.99
    27% off estimated retail
    Terra & Sky Swimsuit Bottoms (view 2)Terra & Sky Swimsuit Bottoms (view 1)
    View Product: Terra & Sky Swimsuit Bottoms

    Terra & Sky

    Swimsuit Bottoms
    Size 1X Plus
    $10.99
    15% off estimated retail
    Cupshe Swimsuit Top (view 2)Cupshe Swimsuit Top (view 1)
    View Product: Cupshe Swimsuit Top

    Cupshe

    Swimsuit Top
    Size 1X Plus
    $17.99 $19
    Boutique + Swimsuit Top (view 2)Boutique + Swimsuit Top (view 1)New With Tags
    View Product: Boutique + Swimsuit Top

    Boutique +

    Swimsuit Top
    Size 1X Plus
    $15.99
    57% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Simply Fit One Piece Swimsuit (view 2)Simply Fit One Piece Swimsuit (view 1)
    View Product: Simply Fit One Piece Swimsuit

    Simply Fit

    One Piece Swimsuit
    Size 1X Plus
    $43.99
    61% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 1X Plus
    $13.99
    44% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 0X Plus
    $10.99
    56% off estimated retail
    Disney Swimsuit Top (view 2)Disney Swimsuit Top (view 1)
    View Product: Disney Swimsuit Top

    Disney

    Swimsuit Top
    Size 1X Plus
    $8.99
    52% off estimated retail
    Cupshe Swimsuit Bottoms (view 2)Cupshe Swimsuit Bottoms (view 1)New With Tags
    View Product: Cupshe Swimsuit Bottoms

    Cupshe

    Swimsuit Bottoms
    Size 0X Plus
    $16.99
    26% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 1X Plus
    $10.99
    31% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 1X Plus
    $10.99
    31% off estimated retail
    Fabrizio Chini One Piece Swimsuit (view 2)Fabrizio Chini One Piece Swimsuit (view 1)
    View Product: Fabrizio Chini One Piece Swimsuit

    Fabrizio Chini

    One Piece Swimsuit
    Size 1X Plus
    $39.99
    60% 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 1X Plus
    $13.99
    52% off estimated retail
    Xhilaration Swimsuit Top (view 2)Xhilaration Swimsuit Top (view 1)
    View Product: Xhilaration Swimsuit Top

    Xhilaration

    Swimsuit Top
    Size 0X Plus
    $10.99
    15% off estimated retail
    ZeroXposur Rash Guard (view 2)ZeroXposur Rash Guard (view 1)
    View Product: ZeroXposur Rash Guard

    ZeroXposur

    Rash Guard
    Size 0X Plus
    $27.99
    70% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 1X Plus
    $14.99
    40% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 0X Plus
    $11.99
    52% off estimated retail
    Nike Swimsuit Top (view 2)Nike Swimsuit Top (view 1)New With Tags
    View Product: Nike Swimsuit Top

    Nike

    Swimsuit Top
    Size 1X Plus
    $27.99
    54% off estimated retail
    ZeroXposur Swimsuit Top (view 2)ZeroXposur Swimsuit Top (view 1)New With Tags
    View Product: ZeroXposur Swimsuit Top

    ZeroXposur

    Swimsuit Top
    Size 0X Plus
    $23.99
    55% off estimated retail
    Adore Me One Piece Swimsuit (view 2)Adore Me One Piece Swimsuit (view 1)
    View Product: Adore Me One Piece Swimsuit

    Adore Me

    One Piece Swimsuit
    Size 0X Plus
    $22.99
    60% off estimated retail
    Lands' End Swimsuit Top (view 2)Lands' End Swimsuit Top (view 1)
    View Product: Lands' End Swimsuit Top

    Lands' End

    Swimsuit Top
    Size 1X Plus
    $24.99
    60% off estimated retail
    Old Navy Swimsuit Top (view 2)Old Navy Swimsuit Top (view 1)
    View Product: Old Navy Swimsuit Top

    Old Navy

    Swimsuit Top
    Size 1X Plus
    $13.99
    44% off estimated retail
    Kona Sol Swimsuit Bottoms (view 2)Kona Sol Swimsuit Bottoms (view 1)New With Tags
    View Product: Kona Sol Swimsuit Bottoms

    Kona Sol

    Swimsuit Bottoms
    Size 0X Plus
    $14.99
    40% 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 1X Plus
    $10.99
    43% off estimated retail
    Lands' End Swimsuit Top (view 2)Lands' End Swimsuit Top (view 1)
    View Product: Lands' End Swimsuit Top

    Lands' End

    Swimsuit Top
    Size 1X Plus
    $21.99
    65% off estimated retail
    Sea Angel One Piece Swimsuit (view 2)Sea Angel One Piece Swimsuit (view 1)
    View Product: Sea Angel One Piece Swimsuit

    Sea Angel

    One Piece Swimsuit
    Size 1X Plus
    $28.99
    39% off estimated retail
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 1X Plus
    $21.99
    56% off estimated retail
    Becca Swimsuit Bottoms (view 2)Becca Swimsuit Bottoms (view 1)
    View Product: Becca Swimsuit Bottoms

    Becca

    Swimsuit Bottoms
    Size 1X Plus
    $15.99
    57% off estimated retail
    Becca Swimsuit Top (view 2)Becca Swimsuit Top (view 1)
    View Product: Becca Swimsuit Top

    Becca

    Swimsuit Top
    Size 1X Plus
    $14.99
    60% off estimated retail
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 1X Plus
    $23.99
    52% off estimated retail
    Adore Me One Piece Swimsuit (view 2)Adore Me One Piece Swimsuit (view 1)
    View Product: Adore Me One Piece Swimsuit

    Adore Me

    One Piece Swimsuit
    Size 0X Plus
    $17.99
    62% off estimated retail
    Kona Sol Swimsuit Bottoms (view 2)Kona Sol Swimsuit Bottoms (view 1)
    View Product: Kona Sol Swimsuit Bottoms

    Kona Sol

    Swimsuit Bottoms
    Size 0X Plus
    $17.99
    28% off estimated retail
    Rue Blue Board Shorts (view 2)Rue Blue Board Shorts (view 1)
    View Product: Rue Blue Board Shorts

    Rue Blue

    Board Shorts
    Size 1X Plus
    $19.99
    62% 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 1X Plus
    $17.99
    40% off estimated retail
    Adore Me Swimsuit Bottoms (view 2)Adore Me Swimsuit Bottoms (view 1)
    View Product: Adore Me Swimsuit Bottoms

    Adore Me

    Swimsuit Bottoms
    Size 0X Plus
    $16.99
    56% off estimated retail
    Adore Me Swimsuit Top (view 2)Adore Me Swimsuit Top (view 1)New With Tags
    View Product: Adore Me Swimsuit Top

    Adore Me

    Swimsuit Top
    Size 0X Plus
    $15.99
    59% off estimated retail
    Kona Sol Swimsuit Top (view 2)Kona Sol Swimsuit Top (view 1)New With Tags
    View Product: Kona Sol Swimsuit Top

    Kona Sol

    Swimsuit Top
    Size 0X Plus
    $18.99
    36% off estimated retail
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 1X Plus
    $21.99
    56% off estimated retail
    Fashion Nova Swimsuit Top (view 2)Fashion Nova Swimsuit Top (view 1)
    View Product: Fashion Nova Swimsuit Top

    Fashion Nova

    Swimsuit Top
    Size 1X Plus
    $10.99
    30% off estimated retail
    Terra & Sky Swimsuit Bottoms (view 2)Terra & Sky Swimsuit Bottoms (view 1)
    View Product: Terra & Sky Swimsuit Bottoms

    Terra & Sky

    Swimsuit Bottoms
    Size 1X Plus
    $8.99
    30% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 1X Plus
    $21.99
    28% off estimated retail
    Anne Cole Signature One Piece Swimsuit (view 2)Anne Cole Signature One Piece Swimsuit (view 1)
    View Product: Anne Cole Signature One Piece Swimsuit

    Anne Cole Signature

    One Piece Swimsuit
    Size 1X Plus
    $21.99
    54% 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 1X Plus
    $13.99
    52% off estimated retail
    Anne Cole Swimsuit Top (view 2)Anne Cole Swimsuit Top (view 1)New With Tags
    View Product: Anne Cole Swimsuit Top

    Anne Cole

    Swimsuit Top
    Size 1X Plus
    $22.99
    54% off estimated retail
    Torrid Wireless Crewneck Sleeve Swimsuit Top (view 2)Torrid Wireless Crewneck Sleeve Swimsuit Top (view 1)Flawed Gem
    View Product: Torrid Wireless Crewneck Sleeve Swimsuit Top

    Torrid

    Wireless Crewneck Sleeve Swimsuit Top
    Size 1X Plus
    $12.99
    77% off estimated retail
    Fashion Nova One Piece Swimsuit (view 2)Fashion Nova One Piece Swimsuit (view 1)New With Tags
    View Product: Fashion Nova One Piece Swimsuit

    Fashion Nova

    One Piece Swimsuit
    Size 1X Plus
    $11.99
    47% off estimated retail
    Birdsong Swimsuit Top (view 2)Birdsong Swimsuit Top (view 1)
    View Product: Birdsong Swimsuit Top

    Birdsong

    Swimsuit Top
    Size 1X Plus
    $47.99
    54% off estimated retail
    Shein Swimsuit Cover Up (view 2)Shein Swimsuit Cover Up (view 1)
    View Product: Shein Swimsuit Cover Up

    Shein

    Swimsuit Cover Up
    Size 0X Plus
    Christina Swimsuit Top (view 2)Christina Swimsuit Top (view 1)
    View Product: Christina Swimsuit Top

    Christina

    Swimsuit Top
    Size 1X Plus
    $14.99
    53% off estimated retail
    SKYE Swimsuit Bottoms (view 2)SKYE Swimsuit Bottoms (view 1)New With Tags
    View Product: SKYE Swimsuit Bottoms

    SKYE

    Swimsuit Bottoms
    Size 0X Plus
    Shein One Piece Swimsuit (view 2)Shein One Piece Swimsuit (view 1)
    View Product: Shein One Piece Swimsuit

    Shein

    One Piece Swimsuit
    Size 0X Plus
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 0X Plus
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 1X Plus
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 0X Plus
    Cupshe One Piece Swimsuit (view 2)Cupshe One Piece Swimsuit (view 1)New With Tags
    View Product: Cupshe One Piece Swimsuit

    Cupshe

    One Piece Swimsuit
    Size 0X Plus
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 0X Plus
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 1X Plus

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