Girls' Swimwear

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Whether it's for summertime or swimming lessons, your girls need the right gear for when they dive into the water. Check out thredUP's selection of girls' swimwear to discover items from top brands at up to 90% off estimated retail.

4,518 items
Penelope Mack Size 6X

View Product: Penelope Mack Size 6X

Penelope Mack

Size 6X
$14.99 $33
Speedo Size 5
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View Product: Speedo Size 5

Speedo

Size 5
$38.99 $74

$23.39 40% off with

Wonder Nation Size 2T

View Product: Wonder Nation Size 2T

Wonder Nation

Size 2T
$6.99 $11
Carter's Size 18 mo

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$14.99 $36

$8.99 40% off with

Forever Classic, Get perfectly polished in trousers, blazers, and more.
Gymboree Size 5

View Product: Gymboree Size 5

Gymboree

Size 5
$11.99 $23

$7.19 40% off with

Gymboree Size 6-12 mo
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View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$9.99 $27

$4.00 60% off with

Justice Size 8

View Product: Justice Size 8

Justice

Size 8
$13.99 $33

$8.39 40% off with

Landsdowne Size 7

View Product: Landsdowne Size 7

Landsdowne

Size 7
$14.99 $25

$8.99 40% off with

Gossip Girl Size 10

View Product: Gossip Girl Size 10

Gossip Girl

Size 10
$14.99 $33

$8.99 40% off with

Justice Size 12
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View Product: Justice Size 12

Justice

Size 12
$13.99 $33

$6.99 50% off with

Justice Size 18
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View Product: Justice Size 18

Justice

Size 18
$14.99 $33

$7.49 50% off with

Crewcuts Outlet Size 12

View Product: Crewcuts Outlet Size 12

Crewcuts Outlet

Size 12
$11.99 $25

$7.19 40% off with

Assorted Brands Size 18 mo

View Product: Assorted Brands Size 18 mo

Assorted Brands

Size 18 mo
$10.99 $22

$6.59 40% off with

Carter's Size 18 mo

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$10.99 $24

$6.59 40% off with

Justice Size 10

View Product: Justice Size 10

Justice

Size 10
$12.99 $33

$7.79 40% off with

Assorted Brands Size 3T

View Product: Assorted Brands Size 3T

Assorted Brands

Size 3T
$17.99 $27
Kanu Surf Size 7

View Product: Kanu Surf Size 7

Kanu Surf

Size 7
$9.99 $22
Hanna Andersson Size 120 cm

View Product: Hanna Andersson Size 120 cm

Hanna Andersson

Size 120 cm
$21.99 $45
Capezio Size Small youth

View Product: Capezio Size Small youth

Capezio

Size Small youth
$10.99 $25
Wonder Woman Size 3T

View Product: Wonder Woman Size 3T

Wonder Woman

Size 3T
$16.99 $27
Speedo Size 6

View Product: Speedo Size 6

Speedo

Size 6
$12.99 $25
Cat & Jack Size 18 mo

View Product: Cat & Jack Size 18 mo

Cat & Jack

Size 18 mo
$11.99 $17
Baby Gap Size 18-24 mo

View Product: Baby Gap Size 18-24 mo

Baby Gap

Size 18-24 mo
$12.99 $21
Old Navy Size 18-24 mo

View Product: Old Navy Size 18-24 mo

Old Navy

Size 18-24 mo
$10.99 $18
Speedo Size Large youth

View Product: Speedo Size Large youth

Speedo

Size Large youth
$11.99 $25
Kanu Surf Size 10

View Product: Kanu Surf Size 10

Kanu Surf

Size 10
$17.99 $33
Baby Gap Size 5

View Product: Baby Gap Size 5

Baby Gap

Size 5
$10.99 $27
Gap Kids Size 6-12 mo

View Product: Gap Kids Size 6-12 mo

Gap Kids

Size 6-12 mo
$9.99 $27
Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$13.99 $20
Hello Kitty Size 4T

View Product: Hello Kitty Size 4T

Hello Kitty

Size 4T
$8.99 $20
Kanu Surf Size 8

View Product: Kanu Surf Size 8

Kanu Surf

Size 8
$12.99 $22
OshKosh B'gosh Size 10

View Product: OshKosh B'gosh Size 10

OshKosh B'gosh

Size 10
$11.99 $24
Hanna Andersson Size 90 cm

View Product: Hanna Andersson Size 90 cm

Hanna Andersson

Size 90 cm
$20.99 $41
Hanna Andersson Size 14

View Product: Hanna Andersson Size 14

Hanna Andersson

Size 14
$22.99 $41
Gap Kids Size Medium kids

View Product: Gap Kids Size Medium kids

Gap Kids

Size Medium kids
$12.99 $32
Old Navy Size 4T

View Product: Old Navy Size 4T

Old Navy

Size 4T
$10.99 $18
Old Navy Size 10

View Product: Old Navy Size 10

Old Navy

Size 10
$10.99 $16
Old Navy Size 2T

View Product: Old Navy Size 2T

Old Navy

Size 2T
$9.99 $14
Ruffle Butts Size 3T

View Product: Ruffle Butts Size 3T

Ruffle Butts

Size 3T
$12.99 $14
REI Size X-Large youth

View Product: REI Size X-Large youth

REI

Size X-Large youth
$14.99 $41
Oscar De La Renta Size 8
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View Product: Oscar De La Renta Size 8

Oscar De La Renta

Size 8
$46.99 $185

$23.50 50% off with

Hanna Andersson Size 6

View Product: Hanna Andersson Size 6

Hanna Andersson

Size 6
$25.99 $41

$18.19 30% off with

Carter's Size 12 mo
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View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$6.99 $34
Wonder Nation Size 18 mo
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View Product: Wonder Nation Size 18 mo

Wonder Nation

Size 18 mo
$6.99 $11
Popreal Size 110 cm

View Product: Popreal Size 110 cm

Popreal

Size 110 cm
$14.99 $41

$8.99 40% off with

Water Wears Size 6-12 mo
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View Product: Water Wears Size 6-12 mo

Water Wears

Size 6-12 mo
$8.99 $20

$5.39 40% off with

Justice Size 6
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View Product: Justice Size 6

Justice

Size 6
$17.99 $35

$8.99 50% off with

NeoSport Size 3
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View Product: NeoSport Size 3

NeoSport

Size 3
$11.99 $34

$5.99 50% off with

Gymboree Size 3T

View Product: Gymboree Size 3T

Gymboree

Size 3T
$12.99 $23

$7.79 40% off with

Lands' End Size 7
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View Product: Lands' End Size 7

Lands' End

Size 7
$11.99 $25

$7.19 40% off with

Gap Kids Size X-Small tots
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View Product: Gap Kids Size X-Small tots

Gap Kids

Size X-Small tots
$10.99 $27

$5.49 50% off with

Janie and Jack Size 3
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View Product: Janie and Jack Size 3

Janie and Jack

Size 3
$10.99 $23

$5.49 50% off with

Assorted Brands Size 140 cm
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View Product: Assorted Brands Size 140 cm

Assorted Brands

Size 140 cm
$9.99 $33

$4.99 50% off with

Radicool Size 10
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View Product: Radicool Size 10

Radicool

Size 10
$9.99 $19.99

$4.99 50% off with

Kiko & Max Size 3T
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View Product: Kiko & Max Size 3T

Kiko & Max

Size 3T
$9.99 $32

$4.99 50% off with

Hanna Andersson Size 80 cm
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View Product: Hanna Andersson Size 80 cm

Hanna Andersson

Size 80 cm
$17.99 $41

$8.99 50% off with

Juicy Couture Size 14
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View Product: Juicy Couture Size 14

Juicy Couture

Size 14
$17.99 $98

$8.99 50% off with

Floatimini Size 4T
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View Product: Floatimini Size 4T

Floatimini

Size 4T
$18.99 $68

$9.49 50% off with

Gap Kids Size 2X-large kids
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View Product: Gap Kids Size 2X-large kids

Gap Kids

Size 2X-large kids
$10.99 $43

$5.49 50% off with

Gymboree Size 4
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View Product: Gymboree Size 4

Gymboree

Size 4
$9.99 $27

$4.99 50% off with

Limeapple Size 12
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View Product: Limeapple Size 12

Limeapple

Size 12
$12.99 $49

$5.20 60% off with

Garnet Hill Size 10
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View Product: Garnet Hill Size 10

Garnet Hill

Size 10
$17.99 $33

$8.99 50% off with

Justice Size 10
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View Product: Justice Size 10

Justice

Size 10
$11.99 $33

$5.99 50% off with

Snowflake Designs Size Large kids

View Product: Snowflake Designs Size Large kids

Snowflake Designs

Size Large kids
$13.99 $41

$8.39 40% off with

Gymboree Size 6-12 mo
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View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$10.99 $27

$5.49 50% off with

Assorted Brands Size X-Large youth
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View Product: Assorted Brands Size X-Large youth

Assorted Brands

Size X-Large youth
$12.99 $33

$6.49 50% off with

Under Armour Size 7
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View Product: Under Armour Size 7

Under Armour

Size 7
$13.99 $41

$6.99 50% off with

Justice Size 12
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View Product: Justice Size 12

Justice

Size 12
$12.99 $33

$6.49 50% off with

Gap Kids Size 12
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View Product: Gap Kids Size 12

Gap Kids

Size 12
$12.99 $43

$6.49 50% off with

Hobie Size 8

View Product: Hobie Size 8

Hobie

Size 8
$15.99 $33

$9.59 40% off with

Carter's Size 14
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View Product: Carter's Size 14

Carter's

Size 14
$8.99 $36

$5.39 40% off with

Love U Lots Size 12
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View Product: Love U Lots Size 12

Love U Lots

Size 12
$8.99 $31

$5.39 40% off with

Justice Size 6
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View Product: Justice Size 6

Justice

Size 6
$12.99 $33

$6.49 50% off with

Gymboree Size 0-3 mo
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View Product: Gymboree Size 0-3 mo

Gymboree

Size 0-3 mo
$12.99 $27

$6.49 50% off with

Assorted Brands Size 4

View Product: Assorted Brands Size 4

Assorted Brands

Size 4
$12.99 $27

$7.79 40% off with

Hanna Andersson Size 120 cm
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View Product: Hanna Andersson Size 120 cm

Hanna Andersson

Size 120 cm
$17.99 $41

$8.99 50% off with

Hanna Andersson Size 14
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View Product: Hanna Andersson Size 14

Hanna Andersson

Size 14
$15.99 $41

$7.99 50% off with

Boden Size 6

View Product: Boden Size 6

Boden

Size 6
$23.99 $49

$14.39 40% off with

Carter's Size 18 mo
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View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$7.99 $34

$5.59 30% off with

Olivier London Size 3

View Product: Olivier London Size 3

Olivier London

Size 3
$32.99 $68

$19.79 40% off with

Sunuva Size 12

View Product: Sunuva Size 12

Sunuva

Size 12
$23.99 $65

$14.39 40% off with

Baby Gap Size 5T
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View Product: Baby Gap Size 5T

Baby Gap

Size 5T
$9.99 $21

$4.99 50% off with

Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$10.99 $20

$6.59 40% off with

Vineyard Vines for Target Size 14
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View Product: Vineyard Vines for Target Size 14

Vineyard Vines for Target

Size 14
$12.99 $25

$6.49 50% off with

Old Navy Size 6
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View Product: Old Navy Size 6

Old Navy

Size 6
$8.99 $16

$5.39 40% off with

Coolibar Size 3T
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View Product: Coolibar Size 3T

Coolibar

Size 3T
$11.99 $41

$5.99 50% off with

Gap Kids Size 8

View Product: Gap Kids Size 8

Gap Kids

Size 8
$13.99 $43

$8.39 40% off with

Billabong Size 6X
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View Product: Billabong Size 6X

Billabong

Size 6X
$11.99 $41

$4.80 60% off with

Cat & Jack Size 18 mo
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View Product: Cat & Jack Size 18 mo

Cat & Jack

Size 18 mo
$11.99 $20

$5.99 50% off with

InGear Size 4
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View Product: InGear Size 4

InGear

Size 4
$9.99 $27

$4.99 50% off with

OshKosh B'gosh Size 12

View Product: OshKosh B'gosh Size 12

OshKosh B'gosh

Size 12
$13.99 $27
Kanu Surf Size 2T

View Product: Kanu Surf Size 2T

Kanu Surf

Size 2T
$8.99 $22
The Children's Place Size 16
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View Product: The Children's Place Size 16

The Children's Place

Size 16
$11.99 $24.95
Motion Wear Size Medium youth

View Product: Motion Wear Size Medium youth

Motion Wear

Size Medium youth
$16.99 $41
Sunshine Swing Size 6

View Product: Sunshine Swing Size 6

Sunshine Swing

Size 6
$13.99 $25
Gymboree Size 10

View Product: Gymboree Size 10

Gymboree

Size 10
$12.99 $23
Cat & Jack Size 9 mo

View Product: Cat & Jack Size 9 mo

Cat & Jack

Size 9 mo
$10.99 $17
L.L.Bean Size 10

View Product: L.L.Bean Size 10

L.L.Bean

Size 10
$11.99 $33
Andy & Evan Size 5

View Product: Andy & Evan Size 5

Andy & Evan

Size 5
$17.99 $68
Old Navy Size 2T

View Product: Old Navy Size 2T

Old Navy

Size 2T
$11.99 $18
Patagonia Size X-Large youth

View Product: Patagonia Size X-Large youth

Patagonia

Size X-Large youth
$10.99 $27
Old Navy Size 4T

View Product: Old Navy Size 4T

Old Navy

Size 4T
$10.99 $18
Speedo Size 14

View Product: Speedo Size 14

Speedo

Size 14
$11.99 $25
Lands' End Size 12

View Product: Lands' End Size 12

Lands' End

Size 12
$14.99 $25
Assorted Brands Size 16

View Product: Assorted Brands Size 16

Assorted Brands

Size 16
$12.99 $33
Kanu Surf Size 2T

View Product: Kanu Surf Size 2T

Kanu Surf

Size 2T
$9.99 $22
Assorted Brands Size 4

View Product: Assorted Brands Size 4

Assorted Brands

Size 4
$12.99 $27
Abercrombie Size 13

View Product: Abercrombie Size 13

Abercrombie

Size 13
$16.99 $37
Kanu Surf Size 12

View Product: Kanu Surf Size 12

Kanu Surf

Size 12
$13.99 $22
Cat & Jack Size 2T

View Product: Cat & Jack Size 2T

Cat & Jack

Size 2T
$8.99 $17
Cat & Jack Size 3T

View Product: Cat & Jack Size 3T

Cat & Jack

Size 3T
$13.99 $17
OshKosh B'gosh Size 9 mo

View Product: OshKosh B'gosh Size 9 mo

OshKosh B'gosh

Size 9 mo
$11.99 $24
Justice Size 8

View Product: Justice Size 8