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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.

$25 - $50Remove filter
29 items
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    Torrid One Piece Swimsuit (view 2)Torrid One Piece Swimsuit (view 1)
    View Product: Torrid One Piece Swimsuit

    Torrid

    One Piece Swimsuit
    Size 3X Plus
    $34.99
    53% off estimated retail
    Torrid One Piece Swimsuit (view 2)Torrid One Piece Swimsuit (view 1)
    View Product: Torrid One Piece Swimsuit

    Torrid

    One Piece Swimsuit
    Size 3X Plus
    $37.99
    50% off estimated retail
    Simply Fit Swimsuit Bottoms (view 2)Simply Fit Swimsuit Bottoms (view 1)New With Tags
    View Product: Simply Fit Swimsuit Bottoms

    Simply Fit

    Swimsuit Bottoms
    Size 3X Plus
    $35.99
    30% off estimated retail
    Coco Reef Swimsuit Bottoms (view 2)Coco Reef Swimsuit Bottoms (view 1)New With Tags
    View Product: Coco Reef Swimsuit Bottoms

    Coco Reef

    Swimsuit Bottoms
    Size 3X Plus
    $29.99
    41% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Athleta Board Shorts (view 2)Athleta Board Shorts (view 1)
    View Product: Athleta Board Shorts

    Athleta

    Board Shorts
    Size 3X Plus
    $28.99
    50% off estimated retail
    Beach Native One Piece Swimsuit (view 2)Beach Native One Piece Swimsuit (view 1)
    View Product: Beach Native One Piece Swimsuit

    Beach Native

    One Piece Swimsuit
    Size 26 Plus
    $38.99
    58% off estimated retail
    Torrid One Piece Swimsuit (view 2)Torrid One Piece Swimsuit (view 1)
    View Product: Torrid One Piece Swimsuit

    Torrid

    One Piece Swimsuit
    Size 3X Plus
    $34.99
    53% off estimated retail
    Freshwater Swimsuit Bottoms (view 2)Freshwater Swimsuit Bottoms (view 1)
    View Product: Freshwater Swimsuit Bottoms

    Freshwater

    Swimsuit Bottoms
    Size 3X Plus
    $37.99
    50% off estimated retail
    Lands' End Rash Guard (view 2)Lands' End Rash Guard (view 1)
    View Product: Lands' End Rash Guard

    Lands' End

    Rash Guard
    Size 3X Plus
    $28.99
    69% off estimated retail
    Adidas One Piece Swimsuit (view 2)Adidas One Piece Swimsuit (view 1)
    View Product: Adidas One Piece Swimsuit

    Adidas

    One Piece Swimsuit
    Size 30 Plus
    $31.99
    57% off estimated retail
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 3X Plus
    $29.99 $19.49 35% off with code THANKU
    21% 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 3X Plus
    $41.99 $27.29 35% off with code THANKU
    63% off estimated retail
    Smartwool One Piece Swimsuit (view 2)Smartwool One Piece Swimsuit (view 1)
    View Product: Smartwool One Piece Swimsuit

    Smartwool

    One Piece Swimsuit
    Size 3X Plus
    $43.99 $35.19 20% off with code THANKU
    61% off estimated retail
    Torrid Swimsuit Top (view 2)Torrid Swimsuit Top (view 1)
    View Product: Torrid Swimsuit Top

    Torrid

    Swimsuit Top
    Size 3X Plus
    $27.99 $11.20 60% off with code THANKU
    45% off estimated retail
    Kanu Surf Rash Guard (view 2)Kanu Surf Rash Guard (view 1)New With Tags
    View Product: Kanu Surf Rash Guard

    Kanu Surf

    Rash Guard
    Size 3X Plus
    $29.99 $19.49 35% off with code THANKU
    46% off estimated retail
    Lands' End One Piece Swimsuit (view 2)Lands' End One Piece Swimsuit (view 1)
    View Product: Lands' End One Piece Swimsuit

    Lands' End

    One Piece Swimsuit
    Size 26 Plus
    $28.99 $15.94 45% off with code THANKU
    69% off estimated retail
    Le Suit Swimsuit Bottoms (view 2)Le Suit Swimsuit Bottoms (view 1)
    View Product: Le Suit Swimsuit Bottoms

    Le Suit

    Swimsuit Bottoms
    Size 3X Plus
    $28.99 $18.84 35% off with code THANKU
    43% off estimated retail
    Alpine Butterfly Swimsuit Bottoms (view 2)Alpine Butterfly Swimsuit Bottoms (view 1)
    View Product: Alpine Butterfly Swimsuit Bottoms

    Alpine Butterfly

    Swimsuit Bottoms
    Size 3X Plus
    $35.99 $23.39 35% off with code THANKU
    68% off estimated retail
    Lands' End Swimsuit Bottoms (view 2)Lands' End Swimsuit Bottoms (view 1)
    View Product: Lands' End Swimsuit Bottoms

    Lands' End

    Swimsuit Bottoms
    Size 26 Plus
    $27.99 $15.39 45% off with code THANKU
    56% off estimated retail
    Blackbough Swimsuit Bottoms (view 2)Blackbough Swimsuit Bottoms (view 1)New With Tags
    View Product: Blackbough Swimsuit Bottoms

    Blackbough

    Swimsuit Bottoms
    Size 3X Plus
    $31.99 $20.79 35% off with code THANKU
    57% off estimated retail
    Chromat One Piece Swimsuit (view 2)Chromat One Piece Swimsuit (view 1)
    View Product: Chromat One Piece Swimsuit

    Chromat

    One Piece Swimsuit
    Size 3X Plus
    $40.99 $26.64 35% off with code THANKU
    75% off estimated retail
    Andie Swimsuit Top (view 2)Andie Swimsuit Top (view 1)New With Tags
    View Product: Andie Swimsuit Top

    Andie

    Swimsuit Top
    Size 3X Plus
    $29.99 $15.00 50% off with code THANKU
    60% off estimated retail
    Drew One Piece Swimsuit (view 2)Drew One Piece Swimsuit (view 1)
    View Product: Drew One Piece Swimsuit

    Drew

    One Piece Swimsuit
    Size 26 Plus
    $41.99 $27.29 35% off with code THANKU
    72% off estimated retail
    Monif C. One Piece Swimsuit (view 2)Monif C. One Piece Swimsuit (view 1)
    View Product: Monif C. One Piece Swimsuit

    Monif C.

    One Piece Swimsuit
    Size 3X Plus
    $35.99 $23.39 35% off with code THANKU
    68% off estimated retail
    Nicole Miller Swimsuit Bottoms (view 2)Nicole Miller Swimsuit Bottoms (view 1)New With Tags
    View Product: Nicole Miller Swimsuit Bottoms

    Nicole Miller

    Swimsuit Bottoms
    Size 3X Plus
    $30.99 $20.14 35% off with code THANKU
    63% off estimated retail
    Adidas One Piece Swimsuit (view 2)Adidas One Piece Swimsuit (view 1)New With Tags
    View Product: Adidas One Piece Swimsuit

    Adidas

    One Piece Swimsuit
    Size 30 Plus
    $28.99 $13.05 55% off with code THANKU
    61% off estimated retail
    Shapermint Swimsuit Top (view 2)Shapermint Swimsuit Top (view 1)Price Drop
    View Product: Shapermint Swimsuit Top

    Shapermint

    Swimsuit Top
    Size 3X Plus
    $30.99 $20.14 35% off with code THANKU
    59% off estimated retail
    Catherine Malandrino One Piece Swimsuit (view 2)Catherine Malandrino One Piece Swimsuit (view 1)Price Drop
    View Product: Catherine Malandrino One Piece Swimsuit

    Catherine Malandrino

    One Piece Swimsuit
    Size 3X Plus
    $44.99 $24.74 45% off with code THANKU
    78% off estimated retail
    Athleta One Piece Swimsuit (view 2)Athleta One Piece Swimsuit (view 1)Price Drop
    View Product: Athleta One Piece Swimsuit

    Athleta

    One Piece Swimsuit
    Size 30 Plus
    $33.99 $23.79 30% off with code THANKU
    65% off estimated retail
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