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.

1,292 items
Sort by:
    Swimsuits for all Swimsuit Bottoms (view 2)Swimsuits for all Swimsuit Bottoms (view 1)
    View Product: Swimsuits for all Swimsuit Bottoms

    Swimsuits for all

    Swimsuit Bottoms
    Size 12
    $18.99
    50% off estimated retail
    Swimsuits for all Swimsuit Top (view 2)Swimsuits for all Swimsuit Top (view 1)
    View Product: Swimsuits for all Swimsuit Top

    Swimsuits for all

    Swimsuit Top
    Size 24 Plus
    $16.99
    55% off estimated retail
    Melrose and Market One Piece Swimsuit (view 2)Melrose and Market One Piece Swimsuit (view 1)
    View Product: Melrose and Market One Piece Swimsuit

    Melrose and Market

    One Piece Swimsuit
    Size 12
    $14.99
    60% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Unbranded One Piece Swimsuit (view 2)Unbranded One Piece Swimsuit (view 1)
    View Product: Unbranded One Piece Swimsuit

    Unbranded

    One Piece Swimsuit
    Size 12
    $16.99
    55% 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 12
    $31.99
    66% off estimated retail
    Canvas One Piece Swimsuit (view 2)Canvas One Piece Swimsuit (view 1)
    View Product: Canvas One Piece Swimsuit

    Canvas

    One Piece Swimsuit
    Size 12
    $14.99
    37% 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 12
    $26.99
    57% 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 12
    $26.99
    57% off estimated retail
    Beach Lingo Swimsuit Bottoms (view 2)Beach Lingo Swimsuit Bottoms (view 1)
    View Product: Beach Lingo Swimsuit Bottoms

    Beach Lingo

    Swimsuit Bottoms
    Size 12
    $6.99
    46% off estimated retail
    Bleu Rod Beattie Swimsuit Bottoms (view 2)Bleu Rod Beattie Swimsuit Bottoms (view 1)
    View Product: Bleu Rod Beattie Swimsuit Bottoms

    Bleu Rod Beattie

    Swimsuit Bottoms
    Size 12
    $21.99
    71% off estimated retail
    Newport News Swimsuit Bottoms (view 2)Newport News Swimsuit Bottoms (view 1)
    View Product: Newport News Swimsuit Bottoms

    Newport News

    Swimsuit Bottoms
    Size 12
    $17.99
    52% off estimated retail
    Trimshaper Swimsuit Top (view 2)Trimshaper Swimsuit Top (view 1)
    View Product: Trimshaper Swimsuit Top

    Trimshaper

    Swimsuit Top
    Size 12
    $18.99
    50% off estimated retail
    Avenue Swimsuit Top (view 2)Avenue Swimsuit Top (view 1)
    View Product: Avenue Swimsuit Top

    Avenue

    Swimsuit Top
    Size 24 Plus
    $14.99
    53% off estimated retail
    Swimsuits for all One Piece Swimsuit (view 2)Swimsuits for all One Piece Swimsuit (view 1)
    View Product: Swimsuits for all One Piece Swimsuit

    Swimsuits for all

    One Piece Swimsuit
    Size 12
    $23.99
    57% off estimated retail
    Seafolly Swimsuit Top (view 2)Seafolly Swimsuit Top (view 1)New With Tags
    View Product: Seafolly Swimsuit Top

    Seafolly

    Swimsuit Top
    Size 12
    $28.99
    74% off estimated retail
    Ulla Popken One Piece Swimsuit (view 2)Ulla Popken One Piece Swimsuit (view 1)
    View Product: Ulla Popken One Piece Swimsuit

    Ulla Popken

    One Piece Swimsuit
    Size 24 Plus
    $17.99
    52% off estimated retail
    Bleu Rod Beattie Swimsuit Bottoms (view 2)Bleu Rod Beattie Swimsuit Bottoms (view 1)
    View Product: Bleu Rod Beattie Swimsuit Bottoms

    Bleu Rod Beattie

    Swimsuit Bottoms
    Size 12
    $25.99
    65% off estimated retail
    Target Swimsuit Bottoms (view 2)Target Swimsuit Bottoms (view 1)
    View Product: Target Swimsuit Bottoms

    Target

    Swimsuit Bottoms
    Size 12
    $6.99
    46% 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 12
    $25.99
    59% off estimated retail
    Baiia Swimsuit Bottoms (view 2)Baiia Swimsuit Bottoms (view 1)
    View Product: Baiia Swimsuit Bottoms

    Baiia

    Swimsuit Bottoms
    Size 12
    $40.99
    67% off estimated retail
    Venus Swimsuit Bottoms (view 2)Venus Swimsuit Bottoms (view 1)
    View Product: Venus Swimsuit Bottoms

    Venus

    Swimsuit Bottoms
    Size 12
    $8.99
    52% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 12
    $10.99
    56% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)New With Tags
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 12
    $44.99
    39% off estimated retail
    Leilani Swimsuit Top (view 2)Leilani Swimsuit Top (view 1)
    View Product: Leilani Swimsuit Top

    Leilani

    Swimsuit Top
    Size 24 Plus
    $22.99
    28% off estimated retail
    Speedo One Piece Swimsuit (view 2)Speedo One Piece Swimsuit (view 1)
    View Product: Speedo One Piece Swimsuit

    Speedo

    One Piece Swimsuit
    Size 12
    $41.99
    42% off estimated retail
    ASOS Swimsuit Bottoms (view 2)ASOS Swimsuit Bottoms (view 1)
    View Product: ASOS Swimsuit Bottoms

    ASOS

    Swimsuit Bottoms
    Size 12
    $16.99
    46% off estimated retail
    Assorted Brands Swimsuit Bottoms (view 2)Assorted Brands Swimsuit Bottoms (view 1)
    View Product: Assorted Brands Swimsuit Bottoms

    Assorted Brands

    Swimsuit Bottoms
    Size 12
    $10.99
    56% off estimated retail
    Love & Sports Swimsuit Top (view 2)Love & Sports Swimsuit Top (view 1)
    View Product: Love & Sports Swimsuit Top

    Love & Sports

    Swimsuit Top
    Size 12
    $12.99
    48% off estimated retail
    Boden One Piece Swimsuit (view 2)Boden One Piece Swimsuit (view 1)
    View Product: Boden One Piece Swimsuit

    Boden

    One Piece Swimsuit
    Size 12
    $36.99
    51% off estimated retail
    Cole of California One Piece Swimsuit (view 2)Cole of California One Piece Swimsuit (view 1)
    View Product: Cole of California One Piece Swimsuit

    Cole of California

    One Piece Swimsuit
    Size 12
    $21.99
    42% 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 12
    $18.99
    50% off estimated retail
    Nike One Piece Swimsuit (view 2)Nike One Piece Swimsuit (view 1)
    View Product: Nike One Piece Swimsuit

    Nike

    One Piece Swimsuit
    Size 12
    $43.99
    42% off estimated retail
    Leilani Swimsuit Top (view 2)Leilani Swimsuit Top (view 1)
    View Product: Leilani Swimsuit Top

    Leilani

    Swimsuit Top
    Size 12
    $13.99
    56% 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 12
    $29.99
    68% off estimated retail
    Miraclesuit Swimsuit Cover Up (view 2)Miraclesuit Swimsuit Cover Up (view 1)
    View Product: Miraclesuit Swimsuit Cover Up

    Miraclesuit

    Swimsuit Cover Up
    Size 12
    $22.99
    80% off estimated retail
    Penbrooke Swimsuits One Piece Swimsuit (view 2)Penbrooke Swimsuits One Piece Swimsuit (view 1)New With Tags
    View Product: Penbrooke Swimsuits One Piece Swimsuit

    Penbrooke Swimsuits

    One Piece Swimsuit
    Size 24 Plus
    $27.99
    65% 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 12
    $17.99
    52% 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 12
    $37.99
    70% off estimated retail
    KIRKLAND Signature One Piece Swimsuit (view 2)KIRKLAND Signature One Piece Swimsuit (view 1)
    View Product: KIRKLAND Signature One Piece Swimsuit

    KIRKLAND Signature

    One Piece Swimsuit
    Size 12
    $11.99
    36% off estimated retail
    Calvin Klein One Piece Swimsuit (view 2)Calvin Klein One Piece Swimsuit (view 1)
    View Product: Calvin Klein One Piece Swimsuit

    Calvin Klein

    One Piece Swimsuit
    Size 12
    $40.99
    70% off estimated retail
    Calvin Klein One Piece Swimsuit (view 2)Calvin Klein One Piece Swimsuit (view 1)
    View Product: Calvin Klein One Piece Swimsuit

    Calvin Klein

    One Piece Swimsuit
    Size 12
    $40.99
    70% off estimated retail
    Calvin Klein One Piece Swimsuit (view 2)Calvin Klein One Piece Swimsuit (view 1)
    View Product: Calvin Klein One Piece Swimsuit

    Calvin Klein

    One Piece Swimsuit
    Size 12
    $33.99
    75% off estimated retail
    ZeroXposur Swimsuit Bottoms (view 2)ZeroXposur Swimsuit Bottoms (view 1)
    View Product: ZeroXposur Swimsuit Bottoms

    ZeroXposur

    Swimsuit Bottoms
    Size 12
    $16.99
    73% off estimated retail
    Assorted Brands Swimsuit Bottoms (view 2)Assorted Brands Swimsuit Bottoms (view 1)New With Tags
    View Product: Assorted Brands Swimsuit Bottoms

    Assorted Brands

    Swimsuit Bottoms
    Size 12
    $10.99
    56% 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 12
    $28.99
    69% off estimated retail
    Seafolly One Piece Swimsuit (view 2)Seafolly One Piece Swimsuit (view 1)
    View Product: Seafolly One Piece Swimsuit

    Seafolly

    One Piece Swimsuit
    Size 12
    $41.99
    75% off estimated retail
    Aqua Swimsuit Bottoms (view 2)Aqua Swimsuit Bottoms (view 1)
    View Product: Aqua Swimsuit Bottoms

    Aqua

    Swimsuit Bottoms
    Size 12
    $11.99
    76% off estimated retail
    Catalina Swimsuit Top (view 2)Catalina Swimsuit Top (view 1)
    View Product: Catalina Swimsuit Top

    Catalina

    Swimsuit Top
    Size 12
    $6.99
    46% off estimated retail
    Vitamin A Swimsuit Bottoms (view 2)Vitamin A Swimsuit Bottoms (view 1)
    View Product: Vitamin A Swimsuit Bottoms

    Vitamin A

    Swimsuit Bottoms
    Size 12
    $29.99
    73% off estimated retail
    River Island One Piece Swimsuit (view 2)River Island One Piece Swimsuit (view 1)
    View Product: River Island One Piece Swimsuit

    River Island

    One Piece Swimsuit
    Size 12
    $14.99
    60% off estimated retail
    Vitamin A Swimsuit Top (view 2)Vitamin A Swimsuit Top (view 1)
    View Product: Vitamin A Swimsuit Top

    Vitamin A

    Swimsuit Top
    Size 12
    $27.99
    75% off estimated retail
    Beach House Swimsuit Bottoms (view 2)Beach House Swimsuit Bottoms (view 1)
    View Product: Beach House Swimsuit Bottoms

    Beach House

    Swimsuit Bottoms
    Size 12
    $22.99
    54% 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 24 Plus
    $12.99
    45% off estimated retail
    Nautica Swimsuit Top (view 2)Nautica Swimsuit Top (view 1)
    View Product: Nautica Swimsuit Top

    Nautica

    Swimsuit Top
    Size 12
    $10.99
    65% off estimated retail
    Magicsuit Swimsuit Top (view 2)Magicsuit Swimsuit Top (view 1)
    View Product: Magicsuit Swimsuit Top

    Magicsuit

    Swimsuit Top
    Size 12
    $27.99
    63% off estimated retail
    Jantzen Swimsuit Cover Up (view 2)Jantzen Swimsuit Cover Up (view 1)New With Tags
    View Product: Jantzen Swimsuit Cover Up

    Jantzen

    Swimsuit Cover Up
    Size 12
    $21.99
    61% off estimated retail
    Sea Level Australia Swimsuit Top (view 2)Sea Level Australia Swimsuit Top (view 1)
    View Product: Sea Level Australia Swimsuit Top
    Size 12
    $23.99
    62% off estimated retail
    Gottex One Piece Swimsuit (view 2)Gottex One Piece Swimsuit (view 1)New With Tags
    View Product: Gottex One Piece Swimsuit

    Gottex

    One Piece Swimsuit
    Size 12
    $33.99
    70% off estimated retail
    Swimsuits for all Swimsuit Top (view 2)Swimsuits for all Swimsuit Top (view 1)
    View Product: Swimsuits for all Swimsuit Top

    Swimsuits for all

    Swimsuit Top
    Size 24 Plus
    $15.99
    57% off estimated retail
    Baku Two Piece Swimsuit (view 2)Baku Two Piece Swimsuit (view 1)
    View Product: Baku Two Piece Swimsuit

    Baku

    Two Piece Swimsuit
    Size 12
    $18.99
    50% off estimated retail
    Lauren by Ralph Lauren One Piece Swimsuit (view 2)Lauren by Ralph Lauren One Piece Swimsuit (view 1)
    View Product: Lauren by Ralph Lauren One Piece Swimsuit

    Lauren by Ralph Lauren

    One Piece Swimsuit
    Size 12
    $44.99
    70% off estimated retail
    Seafolly Swimsuit Bottoms (view 2)Seafolly Swimsuit Bottoms (view 1)
    View Product: Seafolly Swimsuit Bottoms

    Seafolly

    Swimsuit Bottoms
    Size 12
    $22.99
    80% 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 12
    $22.99
    39% off estimated retail

    Loading...