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.

1,274 items
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    Shein One Piece Swimsuit (view 2)Shein One Piece Swimsuit (view 1)
    View Product: Shein One Piece Swimsuit

    Shein

    One Piece Swimsuit
    Size 3X Plus
    $15.99
    33% 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 14
    $43.99
    39% off estimated retail
    Nautica Swimsuit Bottoms (view 2)Nautica Swimsuit Bottoms (view 1)
    View Product: Nautica Swimsuit Bottoms

    Nautica

    Swimsuit Bottoms
    Size 14
    $13.99
    56% 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 14
    $56.99
    37% off estimated retail
    The Edit. Forever Classic, Get perfectly polished in trousers, blazers, and more. Shop The Edit
    Rose Gal Swimsuit Bottoms (view 2)Rose Gal Swimsuit Bottoms (view 1)
    View Product: Rose Gal Swimsuit Bottoms

    Rose Gal

    Swimsuit Bottoms
    Size 14
    $10.99
    56% 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
    $15.99
    57% 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 3X Plus
    $14.99
    37% off estimated retail
    Roxanne Assoulin One Piece Swimsuit (view 2)Roxanne Assoulin One Piece Swimsuit (view 1)
    View Product: Roxanne Assoulin One Piece Swimsuit

    Roxanne Assoulin

    One Piece Swimsuit
    Size 14
    $30.99
    68% off estimated retail
    Venus Swimsuit Bottoms (view 2)Venus Swimsuit Bottoms (view 1)
    View Product: Venus Swimsuit Bottoms

    Venus

    Swimsuit Bottoms
    Size 14
    $8.99
    52% off estimated retail
    Bleu Rod Beattie Swimsuit Top (view 2)Bleu Rod Beattie Swimsuit Top (view 1)
    View Product: Bleu Rod Beattie Swimsuit Top

    Bleu Rod Beattie

    Swimsuit Top
    Size 14
    $21.99
    71% off estimated retail
    Venus Swimsuit Bottoms (view 2)Venus Swimsuit Bottoms (view 1)
    View Product: Venus Swimsuit Bottoms

    Venus

    Swimsuit Bottoms
    Size 14
    $9.99
    47% off estimated retail
    Venus Swimsuit Bottoms (view 2)Venus Swimsuit Bottoms (view 1)
    View Product: Venus Swimsuit Bottoms

    Venus

    Swimsuit Bottoms
    Size 14
    $8.99
    52% off estimated retail
    Venus Swimsuit Top (view 2)Venus Swimsuit Top (view 1)
    View Product: Venus Swimsuit Top

    Venus

    Swimsuit Top
    Size 14
    $8.99
    52% off estimated retail
    Sunshine 79 One Piece Swimsuit (view 2)Sunshine 79 One Piece Swimsuit (view 1)
    View Product: Sunshine 79 One Piece Swimsuit

    Sunshine 79

    One Piece Swimsuit
    Size 14
    $48.99
    67% off estimated retail
    Gottex Two Piece Swimsuit (view 2)Gottex Two Piece Swimsuit (view 1)New With Tags
    View Product: Gottex Two Piece Swimsuit

    Gottex

    Two Piece Swimsuit
    Size 14
    $57.99
    49% off estimated retail
    Gottex One Piece Swimsuit (view 2)Gottex One Piece Swimsuit (view 1)
    View Product: Gottex One Piece Swimsuit

    Gottex

    One Piece Swimsuit
    Size 14
    $57.99
    49% off estimated retail
    Nautica Swimsuit Top (view 2)Nautica Swimsuit Top (view 1)
    View Product: Nautica Swimsuit Top

    Nautica

    Swimsuit Top
    Size 14
    $10.99
    65% off estimated retail
    Jantzen Swimsuit Top (view 2)Jantzen Swimsuit Top (view 1)
    View Product: Jantzen Swimsuit Top

    Jantzen

    Swimsuit Top
    Size 14
    $12.99
    65% off estimated retail
    Summersalt One Piece Swimsuit (view 2)Summersalt One Piece Swimsuit (view 1)Flawed Gem
    View Product: Summersalt One Piece Swimsuit

    Summersalt

    One Piece Swimsuit
    Size 14
    $25.99
    59% off estimated retail
    Magicsuit One Piece Swimsuit (view 2)Magicsuit One Piece Swimsuit (view 1)
    View Product: Magicsuit One Piece Swimsuit

    Magicsuit

    One Piece Swimsuit
    Size 14
    $48.99
    57% off estimated retail
    Trimshaper Swimsuit Top (view 2)Trimshaper Swimsuit Top (view 1)
    View Product: Trimshaper Swimsuit Top

    Trimshaper

    Swimsuit Top
    Size 14
    $15.99
    57% off estimated retail
    Trimshaper One Piece Swimsuit (view 2)Trimshaper One Piece Swimsuit (view 1)
    View Product: Trimshaper One Piece Swimsuit

    Trimshaper

    One Piece Swimsuit
    Size 14
    $24.99
    56% off estimated retail
    Collection Swimsuit Bottoms (view 2)Collection Swimsuit Bottoms (view 1)
    View Product: Collection Swimsuit Bottoms

    Collection

    Swimsuit Bottoms
    Size 14
    $15.99
    70% off estimated retail
    Septangle Swimsuit Top (view 2)Septangle Swimsuit Top (view 1)
    View Product: Septangle Swimsuit Top

    Septangle

    Swimsuit Top
    Size 14
    $10.99
    37% off estimated retail
    Icon Swim Two Piece Swimsuit (view 2)Icon Swim Two Piece Swimsuit (view 1)New With Tags
    View Product: Icon Swim Two Piece Swimsuit

    Icon Swim

    Two Piece Swimsuit
    Size 3X Plus
    $26.99
    54% off estimated retail
    Nautica Swimsuit Bottoms (view 2)Nautica Swimsuit Bottoms (view 1)
    View Product: Nautica Swimsuit Bottoms

    Nautica

    Swimsuit Bottoms
    Size 14
    $13.99
    59% 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 3X Plus
    $28.99
    39% off estimated retail
    Kenneth Cole REACTION Swimsuit Top (view 2)Kenneth Cole REACTION Swimsuit Top (view 1)
    View Product: Kenneth Cole REACTION Swimsuit Top
    Size 14
    $15.99
    65% 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
    64% off estimated retail
    Lauren by Ralph Lauren Swimsuit Bottoms (view 2)Lauren by Ralph Lauren Swimsuit Bottoms (view 1)
    View Product: Lauren by Ralph Lauren Swimsuit Bottoms

    Lauren by Ralph Lauren

    Swimsuit Bottoms
    Size 14
    $36.99
    64% off estimated retail
    Swimsuits for all Swimsuit Cover Up (view 2)Swimsuits for all Swimsuit Cover Up (view 1)New With Tags
    View Product: Swimsuits for all Swimsuit Cover Up

    Swimsuits for all

    Swimsuit Cover Up
    Size 14
    $28.99
    57% off estimated retail
    Forever 21 One Piece Swimsuit (view 2)Forever 21 One Piece Swimsuit (view 1)New With Tags
    View Product: Forever 21 One Piece Swimsuit

    Forever 21

    One Piece Swimsuit
    Size 3X Plus
    $25.99
    39% off estimated retail
    Lauren by Ralph Lauren Swimsuit Top (view 2)Lauren by Ralph Lauren Swimsuit Top (view 1)
    View Product: Lauren by Ralph Lauren Swimsuit Top
    Size 14
    $31.99
    66% off estimated retail
    La Blanca One Piece Swimsuit (view 2)La Blanca One Piece Swimsuit (view 1)
    View Product: La Blanca One Piece Swimsuit

    La Blanca

    One Piece Swimsuit
    Size 14
    $30.99
    56% off estimated retail
    Swimsuits for all Swimsuit Top (view 2)Swimsuits for all Swimsuit Top (view 1)New With Tags
    View Product: Swimsuits for all Swimsuit Top

    Swimsuits for all

    Swimsuit Top
    Size 14
    $22.99
    50% off estimated retail
    Unbranded Swimsuit Bottoms (view 2)Unbranded Swimsuit Bottoms (view 1)
    View Product: Unbranded Swimsuit Bottoms

    Unbranded

    Swimsuit Bottoms
    Size 14
    $12.99
    56% off estimated retail
    Profile One Piece Swimsuit (view 2)Profile One Piece Swimsuit (view 1)
    View Product: Profile One Piece Swimsuit

    Profile

    One Piece Swimsuit
    Size 14
    $21.99
    37% 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 14
    $37.99
    75% off estimated retail
    Zara Board Shorts (view 2)Zara Board Shorts (view 1)
    View Product: Zara Board Shorts

    Zara

    Board Shorts
    Size 3X Plus
    $22.99
    52% 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 14
    $32.99
    57% off estimated retail
    Cocoship One Piece Swimsuit (view 2)Cocoship One Piece Swimsuit (view 1)
    View Product: Cocoship One Piece Swimsuit

    Cocoship

    One Piece Swimsuit
    Size 3X Plus
    $23.99
    31% off estimated retail
    Old Navy Swimsuit Bottoms (view 2)Old Navy Swimsuit Bottoms (view 1)New With Tags
    View Product: Old Navy Swimsuit Bottoms

    Old Navy

    Swimsuit Bottoms
    Size 3X Plus
    $18.99
    28% off estimated retail
    Bleu Rod Beattie One Piece Swimsuit (view 2)Bleu Rod Beattie One Piece Swimsuit (view 1)
    View Product: Bleu Rod Beattie One Piece Swimsuit

    Bleu Rod Beattie

    One Piece Swimsuit
    Size 14
    $37.99
    73% off estimated retail
    Boden Swimsuit Bottoms (view 2)Boden Swimsuit Bottoms (view 1)New With Tags
    View Product: Boden Swimsuit Bottoms

    Boden

    Swimsuit Bottoms
    Size 14
    $31.99
    50% off estimated retail
    Shore Shapes One Piece Swimsuit (view 2)Shore Shapes One Piece Swimsuit (view 1)
    View Product: Shore Shapes One Piece Swimsuit

    Shore Shapes

    One Piece Swimsuit
    Size 14
    $23.99
    36% off estimated retail
    Jantzen One Piece Swimsuit (view 2)Jantzen One Piece Swimsuit (view 1)
    View Product: Jantzen One Piece Swimsuit

    Jantzen

    One Piece Swimsuit
    Size 14
    $28.99
    57% off estimated retail
    Torrid Swimsuit Bottoms (view 2)Torrid Swimsuit Bottoms (view 1)
    View Product: Torrid Swimsuit Bottoms

    Torrid

    Swimsuit Bottoms
    Size 3X Plus
    $20.99
    58% off estimated retail
    Torrid Swimsuit Bottoms (view 2)Torrid Swimsuit Bottoms (view 1)
    View Product: Torrid Swimsuit Bottoms

    Torrid

    Swimsuit Bottoms
    Size 3X Plus
    $32.99
    35% 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
    $17.99
    60% off estimated retail
    Swimsuits for all Swimsuit Cover Up (view 2)Swimsuits for all Swimsuit Cover Up (view 1)
    View Product: Swimsuits for all Swimsuit Cover Up

    Swimsuits for all

    Swimsuit Cover Up
    Size 14
    $26.99
    52% off estimated retail
    Unbranded Swimsuit Top (view 2)Unbranded Swimsuit Top (view 1)
    View Product: Unbranded Swimsuit Top

    Unbranded

    Swimsuit Top
    Size 14
    $17.99
    40% 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 14
    $30.99
    60% off estimated retail
    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 14
    $20.99
    55% off estimated retail
    Antonio Melani Swimsuit Bottoms (view 2)Antonio Melani Swimsuit Bottoms (view 1)New With Tags
    View Product: Antonio Melani Swimsuit Bottoms

    Antonio Melani

    Swimsuit Bottoms
    Size 14
    $17.99
    68% off estimated retail
    Catherines Swimsuit Cover Up (view 2)Catherines Swimsuit Cover Up (view 1)New With Tags
    View Product: Catherines Swimsuit Cover Up

    Catherines

    Swimsuit Cover Up
    Size 30 Plus
    $23.99
    65% off estimated retail
    Kona Sol Swimsuit Bottoms (view 2)Kona Sol Swimsuit Bottoms (view 1)New With Tags
    View Product: Kona Sol Swimsuit Bottoms

    Kona Sol

    Swimsuit Bottoms
    Size 3X Plus
    $17.99
    44% off estimated retail
    Heidi Klum Swim Swimsuit Bottoms (view 2)Heidi Klum Swim Swimsuit Bottoms (view 1)
    View Product: Heidi Klum Swim Swimsuit Bottoms

    Heidi Klum Swim

    Swimsuit Bottoms
    Size 14
    $50.99
    64% 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 14
    $27.99
    64% off estimated retail
    J.Crew Swimsuit Top (view 2)J.Crew Swimsuit Top (view 1)New With Tags
    View Product: J.Crew Swimsuit Top

    J.Crew

    Swimsuit Top
    Size 3X Plus
    $19.99
    72% off estimated retail
    Nike Swimsuit Bottoms (view 2)Nike Swimsuit Bottoms (view 1)
    View Product: Nike Swimsuit Bottoms

    Nike

    Swimsuit Bottoms
    Size 3X Plus
    $22.99
    62% off estimated retail
    Catherines Swimsuit Top (view 2)Catherines Swimsuit Top (view 1)New With Tags
    View Product: Catherines Swimsuit Top

    Catherines

    Swimsuit Top
    Size 30 Plus
    $12.99
    59% 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
    76% off estimated retail
    Croft & Barrow Swimsuit Top (view 2)Croft & Barrow Swimsuit Top (view 1)
    View Product: Croft & Barrow Swimsuit Top

    Croft & Barrow

    Swimsuit Top
    Size 14
    $11.99
    31% off estimated retail
    T.H.E. One Piece Swimsuit (view 2)T.H.E. One Piece Swimsuit (view 1)
    View Product: T.H.E. One Piece Swimsuit

    T.H.E.

    One Piece Swimsuit
    Size 30 Plus
    $13.99
    45% off estimated retail
    Lilly Pulitzer One Piece Swimsuit (view 2)Lilly Pulitzer One Piece Swimsuit (view 1)
    View Product: Lilly Pulitzer One Piece Swimsuit

    Lilly Pulitzer

    One Piece Swimsuit
    Size 14
    $51.99
    63% 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
    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
    41% off estimated retail
    Sporti One Piece Swimsuit (view 2)Sporti One Piece Swimsuit (view 1)
    View Product: Sporti One Piece Swimsuit

    Sporti

    One Piece Swimsuit
    Size 30 Plus
    $18.99
    33% 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 14
    $46.99
    47% off estimated retail
    Boden Swimsuit Top (view 2)Boden Swimsuit Top (view 1)
    View Product: Boden Swimsuit Top

    Boden

    Swimsuit Top
    Size 14
    $28.99
    46% off estimated retail
    Beach Belle Swimsuit Top (view 2)Beach Belle Swimsuit Top (view 1)
    View Product: Beach Belle Swimsuit Top

    Beach Belle

    Swimsuit Top
    Size 14
    $10.99
    43% off estimated retail
    Magicsuit Swimsuit Top (view 2)Magicsuit Swimsuit Top (view 1)
    View Product: Magicsuit Swimsuit Top

    Magicsuit

    Swimsuit Top
    Size 14
    $27.99
    63% off estimated retail

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