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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.

484 items
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    Z&L Swimsuit Cover Up (view 2)Z&L Swimsuit Cover Up (view 1)New With Tags
    View Product: Z&L Swimsuit Cover Up

    Z&L

    Swimsuit Cover Up
    Size 0
    $23.99
    68% 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
    Kona Sol Swimsuit Bottoms (view 2)Kona Sol Swimsuit Bottoms (view 1)
    View Product: Kona Sol Swimsuit Bottoms

    Kona Sol

    Swimsuit Bottoms
    Size 1X Plus
    $19.99
    20% off estimated retail
    Shein One Piece Swimsuit (view 2)Shein One Piece Swimsuit (view 1)New With Tags
    View Product: Shein One Piece Swimsuit

    Shein

    One Piece Swimsuit
    Size 1X Plus
    $11.99
    50% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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 1X Plus
    $27.99
    37% 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
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 0 Plus
    $29.99
    41% off estimated retail
    Kona Sol Swimsuit Cover Up (view 2)Kona Sol Swimsuit Cover Up (view 1)
    View Product: Kona Sol Swimsuit Cover Up

    Kona Sol

    Swimsuit Cover Up
    Size 1X Plus
    $21.99
    42% 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
    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
    Artesands One Piece Swimsuit (view 2)Artesands One Piece Swimsuit (view 1)New With Tags
    View Product: Artesands One Piece Swimsuit

    Artesands

    One Piece Swimsuit
    Size 0
    $43.99
    74% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 1X Plus
    $13.99
    52% 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
    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
    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
    Wantdo Swimsuit Top (view 2)Wantdo Swimsuit Top (view 1)
    View Product: Wantdo Swimsuit Top

    Wantdo

    Swimsuit Top
    Size 1X Plus
    $26.99
    31% 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
    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
    J.Crew One Piece Swimsuit (view 2)J.Crew One Piece Swimsuit (view 1)
    View Product: J.Crew One Piece Swimsuit

    J.Crew

    One Piece Swimsuit
    Size 0
    $34.99
    72% 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 Two Piece Swimsuit (view 2)Unbranded Two Piece Swimsuit (view 1)
    View Product: Unbranded Two Piece Swimsuit

    Unbranded

    Two Piece Swimsuit
    Size 1X Plus
    $15.99
    57% off estimated retail
    J.Crew Board Shorts (view 2)J.Crew Board Shorts (view 1)
    View Product: J.Crew Board Shorts

    J.Crew

    Board Shorts
    Size 0
    $28.99
    74% 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
    PrettyLittleThing One Piece Swimsuit (view 2)PrettyLittleThing One Piece Swimsuit (view 1)
    View Product: PrettyLittleThing One Piece Swimsuit

    PrettyLittleThing

    One Piece Swimsuit
    Size 0
    $29.99
    68% off estimated retail
    Kona Sol Swimsuit Top (view 2)Kona Sol Swimsuit Top (view 1)
    View Product: Kona Sol Swimsuit Top

    Kona Sol

    Swimsuit Top
    Size 1X Plus
    $22.99
    24% off estimated retail
    Chelsea28 Swimsuit Top (view 2)Chelsea28 Swimsuit Top (view 1)
    View Product: Chelsea28 Swimsuit Top

    Chelsea28

    Swimsuit Top
    Size 1X Plus
    $23.99
    52% off estimated retail
    Kona Sol Swimsuit Top (view 2)Kona Sol Swimsuit Top (view 1)
    View Product: Kona Sol Swimsuit Top

    Kona Sol

    Swimsuit Top
    Size 1X Plus
    $15.99
    36% off estimated retail
    Essentials One Piece Swimsuit (view 2)Essentials One Piece Swimsuit (view 1)New With Tags
    View Product: Essentials One Piece Swimsuit

    Essentials

    One Piece Swimsuit
    Size 1X Plus
    $13.99
    45% 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
    Old Navy One Piece Swimsuit (view 2)Old Navy One Piece Swimsuit (view 1)New With Tags
    View Product: Old Navy One Piece Swimsuit

    Old Navy

    One Piece Swimsuit
    Size 1X Plus
    $36.99
    22% 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
    J.Crew Board Shorts (view 2)J.Crew Board Shorts (view 1)
    View Product: J.Crew Board Shorts

    J.Crew

    Board Shorts
    Size 0
    $25.99
    75% 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
    Patagonia Board Shorts (view 2)Patagonia Board Shorts (view 1)
    View Product: Patagonia Board Shorts

    Patagonia

    Board Shorts
    Size 0
    $29.99
    52% 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
    Soul Swimsuit Top (view 2)Soul Swimsuit Top (view 1)New With Tags
    View Product: Soul Swimsuit Top

    Soul

    Swimsuit Top
    Size 0
    $36.99
    63% off estimated retail
    Venus Swimsuit Top (view 2)Venus Swimsuit Top (view 1)
    View Product: Venus Swimsuit Top

    Venus

    Swimsuit Top
    Size 1X Plus
    $8.99
    52% 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
    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
    $7.99
    38% 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
    56% off estimated retail
    Fashion Nova Swimsuit Bottoms (view 2)Fashion Nova Swimsuit Bottoms (view 1)New With Tags
    View Product: Fashion Nova Swimsuit Bottoms

    Fashion Nova

    Swimsuit Bottoms
    Size 1X Plus
    $12.99
    23% 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
    32% 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
    $19.99
    58% 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
    56% 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
    $16.99
    36% off estimated retail
    Shein One Piece Swimsuit (view 2)Shein One Piece Swimsuit (view 1)
    View Product: Shein One Piece Swimsuit

    Shein

    One Piece Swimsuit
    Size 1X Plus

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