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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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40 items
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    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $6.99 $5.59 20% off with code HOTDEAL
    76% off estimated retail
    Catalina Swimsuit Top (view 2)Catalina Swimsuit Top (view 1)
    View Product: Catalina Swimsuit Top

    Catalina

    Swimsuit Top
    Size 3X Plus
    $8.99 $7.19 20% off with code HOTDEAL
    38% off estimated retail
    Burnside Board Shorts (view 2)Burnside Board Shorts (view 1)
    View Product: Burnside Board Shorts

    Burnside

    Board Shorts
    Size 3X Plus
    $11.99 $9.59 20% off with code HOTDEAL
    41% off estimated retail
    Old Navy Swimsuit Bottoms (view 2)Old Navy Swimsuit Bottoms (view 1)
    View Product: Old Navy Swimsuit Bottoms

    Old Navy

    Swimsuit Bottoms
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    60% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Terra & Sky Swimsuit Bottoms (view 2)Terra & Sky Swimsuit Bottoms (view 1)
    View Product: Terra & Sky Swimsuit Bottoms

    Terra & Sky

    Swimsuit Bottoms
    Size 3X Plus
    $9.99 $7.99 20% off with code HOTDEAL
    23% off estimated retail
    Unbranded Board Shorts (view 2)Unbranded Board Shorts (view 1)
    View Product: Unbranded Board Shorts

    Unbranded

    Board Shorts
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    64% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 22 Plus
    $15.99 $12.79 20% off with code HOTDEAL
    48% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 3X Plus
    $11.99 $9.59 20% off with code HOTDEAL
    58% off estimated retail
    Xhilaration Swimsuit Top (view 2)Xhilaration Swimsuit Top (view 1)
    View Product: Xhilaration Swimsuit Top

    Xhilaration

    Swimsuit Top
    Size 22 Plus
    $8.99 $7.19 20% off with code HOTDEAL
    38% off estimated retail
    Fashion Nova One Piece Swimsuit (view 2)Fashion Nova One Piece Swimsuit (view 1)
    View Product: Fashion Nova One Piece Swimsuit

    Fashion Nova

    One Piece Swimsuit
    Size 3X Plus
    $11.99 $9.59 20% off with code HOTDEAL
    36% off estimated retail
    Fashion Nova One Piece Swimsuit (view 2)Fashion Nova One Piece Swimsuit (view 1)
    View Product: Fashion Nova One Piece Swimsuit

    Fashion Nova

    One Piece Swimsuit
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    52% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 3X Plus
    $11.99 $9.59 20% off with code HOTDEAL
    60% off estimated retail
    Venus One Piece Swimsuit (view 2)Venus One Piece Swimsuit (view 1)
    View Product: Venus One Piece Swimsuit

    Venus

    One Piece Swimsuit
    Size 22 Plus
    $13.99 $11.19 20% off with code HOTDEAL
    58% off estimated retail
    Dippin Daisy's Swimwear Swimsuit Top (view 2)Dippin Daisy's Swimwear Swimsuit Top (view 1)New With Tags
    View Product: Dippin Daisy's Swimwear Swimsuit Top

    Dippin Daisy's Swimwear

    Swimsuit Top
    Size 3X Plus
    $11.99 $9.59 20% off with code HOTDEAL
    60% off estimated retail
    Time and Tru Swimsuit Top (view 2)Time and Tru Swimsuit Top (view 1)
    View Product: Time and Tru Swimsuit Top

    Time and Tru

    Swimsuit Top
    Size 3X Plus
    $8.99 $7.19 20% off with code HOTDEAL
    38% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 22 Plus
    $15.99 $12.79 20% off with code HOTDEAL
    48% off estimated retail
    Time and Tru Swimsuit Bottoms (view 2)Time and Tru Swimsuit Bottoms (view 1)
    View Product: Time and Tru Swimsuit Bottoms

    Time and Tru

    Swimsuit Bottoms
    Size 3X Plus
    $6.99 $5.59 20% off with code HOTDEAL
    53% off estimated retail
    PrettyLittleThing Swimsuit Top (view 2)PrettyLittleThing Swimsuit Top (view 1)New With Tags
    View Product: PrettyLittleThing Swimsuit Top

    PrettyLittleThing

    Swimsuit Top
    Size 22 Plus
    $12.99 $10.39 20% off with code HOTDEAL
    65% off estimated retail
    White Stag Swimsuit Top (view 2)White Stag Swimsuit Top (view 1)
    View Product: White Stag Swimsuit Top

    White Stag

    Swimsuit Top
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    30% off estimated retail
    Zaful Swimsuit Bottoms (view 2)Zaful Swimsuit Bottoms (view 1)
    View Product: Zaful Swimsuit Bottoms

    Zaful

    Swimsuit Bottoms
    Size 3X Plus
    $8.99 $7.19 20% off with code HOTDEAL
    64% off estimated retail
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 3X Plus
    $8.99 $7.19 20% off with code HOTDEAL
    43% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 3X Plus
    $11.99 $9.59 20% off with code HOTDEAL
    60% off estimated retail
    Wild Fable Swimsuit Bottoms (view 2)Wild Fable Swimsuit Bottoms (view 1)
    View Product: Wild Fable Swimsuit Bottoms

    Wild Fable

    Swimsuit Bottoms
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    43% off estimated retail
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 3X Plus
    $8.99 $7.19 20% off with code HOTDEAL
    50% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    64% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $6.99 $5.59 20% off with code HOTDEAL
    76% off estimated retail
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    43% off estimated retail
    Catalina Swimsuit Bottoms (view 2)Catalina Swimsuit Bottoms (view 1)
    View Product: Catalina Swimsuit Bottoms

    Catalina

    Swimsuit Bottoms
    Size 3X Plus
    $8.99 $7.19 20% off with code HOTDEAL
    38% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $7.99 $6.39 20% off with code HOTDEAL
    72% off estimated retail
    Cyn & Luca Swimsuit Bottoms (view 2)Cyn & Luca Swimsuit Bottoms (view 1)New With Tags
    View Product: Cyn & Luca Swimsuit Bottoms

    Cyn & Luca

    Swimsuit Bottoms
    Size 3X Plus
    $9.99 $7.99 20% off with code HOTDEAL
    76% off estimated retail
    Shein Swimsuit Bottoms (view 2)Shein Swimsuit Bottoms (view 1)
    View Product: Shein Swimsuit Bottoms

    Shein

    Swimsuit Bottoms
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    43% off estimated retail
    Shein Swimsuit Top (view 2)Shein Swimsuit Top (view 1)
    View Product: Shein Swimsuit Top

    Shein

    Swimsuit Top
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    43% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $10.99 $8.79 20% off with code HOTDEAL
    64% off estimated retail
    Woman Swimsuit Bottoms (view 2)Woman Swimsuit Bottoms (view 1)New With Tags
    View Product: Woman Swimsuit Bottoms

    Woman

    Swimsuit Bottoms
    Size 22 Plus
    $12.99 $10.39 20% off with code HOTDEAL
    31% off estimated retail
    Decree Swimsuit Bottoms (view 2)Decree Swimsuit Bottoms (view 1)New With Tags
    View Product: Decree Swimsuit Bottoms

    Decree

    Swimsuit Bottoms
    Size 3X Plus
    $11.99 $9.59 20% off with code HOTDEAL
    47% off estimated retail
    Decree Swimsuit Top (view 2)Decree Swimsuit Top (view 1)
    View Product: Decree Swimsuit Top

    Decree

    Swimsuit Top
    Size 3X Plus
    $12.99 $10.39 20% off with code HOTDEAL
    42% off estimated retail
    Cider Swimsuit Bottoms (view 2)Cider Swimsuit Bottoms (view 1)Price Drop
    View Product: Cider Swimsuit Bottoms

    Cider

    Swimsuit Bottoms
    Size 3X Plus
    $12.99 $10.39 20% off with code HOTDEAL
    56% off estimated retail
    Charlotte Russe Swimsuit Bottoms (view 2)Charlotte Russe Swimsuit Bottoms (view 1)
    View Product: Charlotte Russe Swimsuit Bottoms

    Charlotte Russe

    Swimsuit Bottoms
    Size 3X Plus
    $13.99 $11.19 20% off with code HOTDEAL
    36% off estimated retail
    White Stag Swimsuit Top (view 2)White Stag Swimsuit Top (view 1)
    View Product: White Stag Swimsuit Top

    White Stag

    Swimsuit Top
    Size 3X Plus
    $15.99 $12.79 20% off with code HOTDEAL
    31% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 3X Plus
    $6.99 $5.59 20% off with code HOTDEAL
    76% off estimated retail
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