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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.

369 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 1X Plus
    $17.99
    37% off estimated retail
    HoneyLove Swimsuit Top (view 2)HoneyLove Swimsuit Top (view 1)
    View Product: HoneyLove Swimsuit Top

    HoneyLove

    Swimsuit Top
    Size 1X Plus
    $46.99
    53% off estimated retail
    Lucky Swimsuit Bottoms (view 2)Lucky Swimsuit Bottoms (view 1)
    View Product: Lucky Swimsuit Bottoms

    Lucky

    Swimsuit Bottoms
    Size 1X Plus
    $30.99
    51% 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
    $18.99
    36% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    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
    $22.99
    50% off estimated retail
    Hermoza Swimsuit Cover Up (view 2)Hermoza Swimsuit Cover Up (view 1)
    View Product: Hermoza Swimsuit Cover Up

    Hermoza

    Swimsuit Cover Up
    Size 00
    $46.99
    53% off estimated retail
    Ted Baker London One Piece Swimsuit (view 2)Ted Baker London One Piece Swimsuit (view 1)
    View Product: Ted Baker London One Piece Swimsuit

    Ted Baker London

    One Piece Swimsuit
    Size 00
    $52.99
    66% off estimated retail
    Victoria's Secret Swimsuit Top (view 2)Victoria's Secret Swimsuit Top (view 1)
    View Product: Victoria's Secret Swimsuit Top

    Victoria's Secret

    Swimsuit Top
    Size 1X Plus
    $17.99
    53% off estimated retail
    Show Me Your Mumu X Barbie Swimsuit Top (view 2)Show Me Your Mumu X Barbie Swimsuit Top (view 1)
    View Product: Show Me Your Mumu X Barbie Swimsuit Top
    Size 1X Plus
    $26.99
    69% off estimated retail
    Ellos Swimsuit Cover Up (view 2)Ellos Swimsuit Cover Up (view 1)
    View Product: Ellos Swimsuit Cover Up

    Ellos

    Swimsuit Cover Up
    Size 1X Plus
    $13.99
    51% 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
    $9.99
    23% off estimated retail
    Beachsissi One Piece Swimsuit (view 2)Beachsissi One Piece Swimsuit (view 1)New With Tags
    View Product: Beachsissi One Piece Swimsuit

    Beachsissi

    One Piece Swimsuit
    Size 1X Plus
    $26.99
    24% 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
    $13.99
    50% 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 00
    $14.99
    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 1X Plus
    $33.99
    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
    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
    $21.99 $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
    $29.99
    73% 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
    $16.99
    44% off estimated retail
    Wild Fable Swimsuit Bottoms (view 2)Wild Fable Swimsuit Bottoms (view 1)New With Tags
    View Product: Wild Fable Swimsuit Bottoms

    Wild Fable

    Swimsuit Bottoms
    Size 00
    $18.99
    40% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 1X Plus
    $12.99
    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
    $12.99
    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
    Kitty and Vibe Swimsuit Bottoms (view 2)Kitty and Vibe Swimsuit Bottoms (view 1)
    View Product: Kitty and Vibe Swimsuit Bottoms

    Kitty and Vibe

    Swimsuit Bottoms
    Size 00
    $19.99
    47% 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
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 1X Plus
    $17.99
    40% 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
    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
    $28.99
    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
    $18.99
    36% 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
    $14.99
    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
    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 00
    $32.99
    74% 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
    Good American Swimsuit Top (view 2)Good American Swimsuit Top (view 1)
    View Product: Good American Swimsuit Top

    Good American

    Swimsuit Top
    Size 00
    $24.99
    75% 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
    $26.99
    47% 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
    Torrid Swimsuit Bottoms (view 2)Torrid Swimsuit Bottoms (view 1)
    View Product: Torrid Swimsuit Bottoms

    Torrid

    Swimsuit Bottoms
    Size 1X 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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