thredUP LogothredUP | An Online Consignment & Thrift StorethredUP
Magnifying glassMagnifying glass icon
My thredUPMy thredUP Icon
0
CartLink to your thredUP cart
Check out

Girls' Swimwear

ChevronNavigation chevron icon

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.

3,856 items
Gap Kids Size 5 Slim
Gap Kids Size 5 Slim

View Product: Gap Kids Size 5 Slim

Gap Kids

Size 5 Slim
$11.99 $30

$8.39 30% off with

Assorted Brands Size 2
Assorted Brands Size 2
Price Drop BadgePrice Drop

View Product: Assorted Brands Size 2

Assorted Brands

Size 2
$3.99 $20
Janie and Jack Size 2T
Janie and Jack Size 2T

View Product: Janie and Jack Size 2T

Janie and Jack

Size 2T
$11.99 $29

$7.19 40% off with

Assorted Brands Size Large kids
Assorted Brands Size Large kids

View Product: Assorted Brands Size Large kids

Assorted Brands

Size Large kids
$10.99 $31

$6.59 40% off with

Gymboree Size 12-18 mo
Gymboree Size 12-18 mo

View Product: Gymboree Size 12-18 mo

Gymboree

Size 12-18 mo
$8.99 $25

$7.19 20% off with

Sunshine Swing Size 7
Sunshine Swing Size 7

View Product: Sunshine Swing Size 7

Sunshine Swing

Size 7
$8.99 $23

$7.19 20% off with

Cat & Jack Size 14
Cat & Jack Size 14

View Product: Cat & Jack Size 14

Cat & Jack

Size 14
$7.99 $15

$6.39 20% off with

St. Eve Swim Size X-Small tots
St. Eve Swim Size X-Small tots

View Product: St. Eve Swim Size X-Small tots

St. Eve Swim

Size X-Small tots
$5.99 $15
Cat & Jack Size 4
Cat & Jack Size 4

View Product: Cat & Jack Size 4

Cat & Jack

Size 4
$7.99 $13

$6.39 20% off with

Cat & Jack Size 2T
Cat & Jack Size 2T

View Product: Cat & Jack Size 2T

Cat & Jack

Size 2T
$6.99 $10
Boden Size 13
Boden Size 13

View Product: Boden Size 13

Boden

Size 13
$22.99 $46

$18.39 20% off with

Ralph Lauren Size 12 mo
Ralph Lauren Size 12 mo

View Product: Ralph Lauren Size 12 mo

Ralph Lauren

Size 12 mo
$4.99 $20
Be Mine Size 18 mo
Be Mine Size 18 mo

View Product: Be Mine Size 18 mo

Be Mine

Size 18 mo
$5.99 $10
Assorted Brands Size 10
Assorted Brands Size 10

View Product: Assorted Brands Size 10

Assorted Brands

Size 10
$13.99 $31

$11.19 20% off with

Unbranded Size 80 cm
Unbranded Size 80 cm

View Product: Unbranded Size 80 cm

Unbranded

Size 80 cm
$7.99 $20

$6.39 20% off with

Old Navy Size Medium kids
Old Navy Size Medium kids

View Product: Old Navy Size Medium kids

Old Navy

Size Medium kids
$8.99 $17

$7.19 20% off with

Cat & Jack Size 6X
Cat & Jack Size 6X

View Product: Cat & Jack Size 6X

Cat & Jack

Size 6X
$6.99 $15
M&S Size 2
M&S Size 2

View Product: M&S Size 2

M&S

Size 2
$4.99 $20
OshKosh B'gosh Size 6 mo
OshKosh B'gosh Size 6 mo

View Product: OshKosh B'gosh Size 6 mo

OshKosh B'gosh

Size 6 mo
$7.99 $22

$6.39 20% off with

Wonder Nation Size 14
Wonder Nation Size 14

View Product: Wonder Nation Size 14

Wonder Nation

Size 14
$6.99 $15
Gymboree Size 18-24 mo
Gymboree Size 18-24 mo

View Product: Gymboree Size 18-24 mo

Gymboree

Size 18-24 mo
$8.99 $25

$7.19 20% off with

Cat & Jack Size 6
Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$7.99 $15

$6.39 20% off with

REI Size 18
REI Size 18

View Product: REI Size 18

REI

Size 18
$7.99 $26

$6.39 20% off with

Roxy Size 18 mo
Roxy Size 18 mo

View Product: Roxy Size 18 mo

Roxy

Size 18 mo
$8.99 $26

$7.19 20% off with

Just One Year by Carter's Size 5T
Just One Year by Carter's Size 5T

View Product: Just One Year by Carter's Size 5T
More Than Magic Size 3T
More Than Magic Size 3T

View Product: More Than Magic Size 3T

More Than Magic

Size 3T
$6.99 $13
Disney Size 3
Disney Size 3

View Product: Disney Size 3

Disney

Size 3
$11.99 $25

$9.59 20% off with

Jantzen Size 5
Jantzen Size 5

View Product: Jantzen Size 5

Jantzen

Size 5
$5.99 $13
Disney Store Size 3-6 mo
Disney Store Size 3-6 mo

View Product: Disney Store Size 3-6 mo

Disney Store

Size 3-6 mo
$4.99 $13
Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$13.99 $36

$11.19 20% off with

Kiko & Max Size 24 mo
Kiko & Max Size 24 mo

View Product: Kiko & Max Size 24 mo

Kiko & Max

Size 24 mo
$9.99 $26

$7.99 20% off with

Baby Buns Size 18 mo
Baby Buns Size 18 mo

View Product: Baby Buns Size 18 mo

Baby Buns

Size 18 mo
$6.99 $20
Old Navy Size 3T
Old Navy Size 3T

View Product: Old Navy Size 3T

Old Navy

Size 3T
$7.99 $17

$6.39 20% off with

More Than Magic Size 7
More Than Magic Size 7

View Product: More Than Magic Size 7

More Than Magic

Size 7
$6.99 $15
Cat & Jack Size 6
Cat & Jack Size 6

View Product: Cat & Jack Size 6

Cat & Jack

Size 6
$8.99 $15

$7.19 20% off with

Hope & Henry Size 18-24 mo
Hope & Henry Size 18-24 mo

View Product: Hope & Henry Size 18-24 mo

Hope & Henry

Size 18-24 mo
$8.99 $20

$7.19 20% off with

The Children's Place Size 5
The Children's Place Size 5

View Product: The Children's Place Size 5

The Children's Place

Size 5
$7.99 $13

$6.39 20% off with

Baby Buns Size 3T
Baby Buns Size 3T

View Product: Baby Buns Size 3T

Baby Buns

Size 3T
$10.99 $26

$8.79 20% off with

Duck Crossing Size 3
Duck Crossing Size 3

View Product: Duck Crossing Size 3

Duck Crossing

Size 3
$7.99 $13

$6.39 20% off with

Wonder Nation Size 6
Wonder Nation Size 6

View Product: Wonder Nation Size 6

Wonder Nation

Size 6
$7.99 $15

$6.39 20% off with

Zara Size 13
Zara Size 13
New With Tags BadgeNew With Tags

View Product: Zara Size 13

Zara

Size 13
$14.99 $38

$11.99 20% off with

Shade Critters Size 4T
Shade Critters Size 4T

View Product: Shade Critters Size 4T

Shade Critters

Size 4T
$16.99 $51

$13.59 20% off with

Gerry Size 10
Gerry Size 10

View Product: Gerry Size 10

Gerry

Size 10
$12.99 $31

$10.39 20% off with

Stella Cove Size 12
Stella Cove Size 12

View Product: Stella Cove Size 12

Stella Cove

Size 12
$14.99 $38

$11.99 20% off with

Art Class Size 6
Art Class Size 6

View Product: Art Class Size 6

Art Class

Size 6
$11.99 $19

$9.59 20% off with

Under Armour Size 12
Under Armour Size 12

View Product: Under Armour Size 12

Under Armour

Size 12
$20.99 $38

$16.79 20% off with

The Children's Place Size 4T
The Children's Place Size 4T

View Product: The Children's Place Size 4T

The Children's Place

Size 4T
$8.99 $20

$7.19 20% off with

Carter's Size 3T
Carter's Size 3T

View Product: Carter's Size 3T

Carter's

Size 3T
$9.99 $28

$7.99 20% off with

Penelope Mack Size 12 mo
Penelope Mack Size 12 mo

View Product: Penelope Mack Size 12 mo

Penelope Mack

Size 12 mo
$6.99 $20
Old Navy Size 3T
Old Navy Size 3T

View Product: Old Navy Size 3T

Old Navy

Size 3T
$9.99 $17

$7.99 20% off with

Old Navy Size Large kids
Old Navy Size Large kids

View Product: Old Navy Size Large kids

Old Navy

Size Large kids
$8.99 $20

$7.19 20% off with

Sol Swim Size 2T
Sol Swim Size 2T

View Product: Sol Swim Size 2T

Sol Swim

Size 2T
$8.99 $20

$7.19 20% off with

Floatimini Size 7
Floatimini Size 7

View Product: Floatimini Size 7

Floatimini

Size 7
$17.99 $77

$14.39 20% off with

Disney Size 3T
Disney Size 3T

View Product: Disney Size 3T

Disney

Size 3T
$11.99 $25

$9.59 20% off with

Wonder Nation Size 6
Wonder Nation Size 6

View Product: Wonder Nation Size 6

Wonder Nation

Size 6
$8.99 $15

$7.19 20% off with

Lands' End Size 5
Lands' End Size 5

View Product: Lands' End Size 5

Lands' End

Size 5
$10.99 $23

$8.79 20% off with

Old Navy Size Medium kids
Old Navy Size Medium kids

View Product: Old Navy Size Medium kids

Old Navy

Size Medium kids
$6.99 $13
Marimekko Size 18 mo
Marimekko Size 18 mo

View Product: Marimekko Size 18 mo

Marimekko

Size 18 mo
$8.99 $31

$7.19 20% off with

Justice Active Size 12
Justice Active Size 12

View Product: Justice Active Size 12

Justice Active

Size 12
$13.99 $31

$11.19 20% off with

Hula Star Size 2T
Hula Star Size 2T

View Product: Hula Star Size 2T

Hula Star

Size 2T
$5.99 $15
The Children's Place Size 9-12 mo
The Children's Place Size 9-12 mo

View Product: The Children's Place Size 9-12 mo

The Children's Place

Size 9-12 mo
$5.99 $15
Disney Size 90 cm
Disney Size 90 cm

View Product: Disney Size 90 cm

Disney

Size 90 cm
$9.99 $20

$7.99 20% off with

Summer Crush Size 14
Summer Crush Size 14

View Product: Summer Crush Size 14

Summer Crush

Size 14
$8.99 $15

$7.19 20% off with

Art Class Size 6
Art Class Size 6

View Product: Art Class Size 6

Art Class

Size 6
$8.99 $19

$7.19 20% off with

Lands' End Size 10
Lands' End Size 10
Price Drop BadgePrice Drop

View Product: Lands' End Size 10

Lands' End

Size 10
$3.99 $31
Baby Gap Size 2
Baby Gap Size 2

View Product: Baby Gap Size 2

Baby Gap

Size 2
$11.99 $25

$8.39 30% off with

Unbranded Size 18
Unbranded Size 18
Price Drop BadgePrice Drop

View Product: Unbranded Size 18

Unbranded

Size 18
$5.99 $31
Old Navy Size 18-24 mo
Old Navy Size 18-24 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 18-24 mo

Old Navy

Size 18-24 mo
$3.99 $17
Assorted Brands Size 10
Assorted Brands Size 10

View Product: Assorted Brands Size 10

Assorted Brands

Size 10
$10.99 $31

$6.59 40% off with

Gap Kids Size 8
Gap Kids Size 8

View Product: Gap Kids Size 8

Gap Kids

Size 8
$11.99 $30

$7.19 40% off with

Carter's Size 12 mo
Carter's Size 12 mo

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$9.99 $34

$5.99 40% off with

Junk Food Size 2T
Junk Food Size 2T
Price Drop BadgePrice Drop

View Product: Junk Food Size 2T

Junk Food

Size 2T
$4.99 $26
Milly Minis Size 10
Milly Minis Size 10
Price Drop BadgePrice Drop

View Product: Milly Minis Size 10

Milly Minis

Size 10
$50.99 $152

$25.50 50% off with

Cat & Jack Size 9-12 mo
Cat & Jack Size 9-12 mo

View Product: Cat & Jack Size 9-12 mo

Cat & Jack

Size 9-12 mo
$5.99 $10
Crewcuts Size 12
Crewcuts Size 12

View Product: Crewcuts Size 12

Crewcuts

Size 12
$14.99 $31

$11.99 20% off with

Unbranded Size 0-3 mo
Unbranded Size 0-3 mo

View Product: Unbranded Size 0-3 mo

Unbranded

Size 0-3 mo
$6.99 $20
Cat & Jack Size X-Large kids
Cat & Jack Size X-Large kids

View Product: Cat & Jack Size X-Large kids

Cat & Jack

Size X-Large kids
$8.99 $15

$7.19 20% off with

Crewcuts Size 12
Crewcuts Size 12
New With Tags BadgeNew With Tags

View Product: Crewcuts Size 12

Crewcuts

Size 12
$11.99 $31

$9.59 20% off with

The Children's Place Size 10
The Children's Place Size 10

View Product: The Children's Place Size 10

The Children's Place

Size 10
$7.99 $18

$6.39 20% off with

Old Navy Size 8
Old Navy Size 8

View Product: Old Navy Size 8

Old Navy

Size 8
$6.99 $15
Crewcuts Size 12
Crewcuts Size 12
New With Tags BadgeNew With Tags

View Product: Crewcuts Size 12

Crewcuts

Size 12
$11.99 $31

$9.59 20% off with

Circo Size 5T
Circo Size 5T

View Product: Circo Size 5T

Circo

Size 5T
$7.99 $13

$6.39 20% off with

Copper Key Size 10
Copper Key Size 10

View Product: Copper Key Size 10

Copper Key

Size 10
$6.99 $19
Nicole Miller New York Size 4T
Nicole Miller New York Size 4T

View Product: Nicole Miller New York Size 4T

Nicole Miller New York

Size 4T
$6.99 $19
OshKosh B'gosh Size 8
OshKosh B'gosh Size 8

View Product: OshKosh B'gosh Size 8

OshKosh B'gosh

Size 8
$6.99 $20
Op Size 10
Op Size 10

View Product: Op Size 10

Op

Size 10
$6.99 $15
Simple Joys by Carter's Size 24 mo
Simple Joys by Carter's Size 24 mo

View Product: Simple Joys by Carter's Size 24 mo

Simple Joys by Carter's

Size 24 mo
$3.99 $10
Op Size 7
Op Size 7

View Product: Op Size 7

Op

Size 7
$5.99 $10
Lands' End Size 10
Lands' End Size 10

View Product: Lands' End Size 10

Lands' End

Size 10
$7.99 $23

$6.39 20% off with

UV Skinz Size 6
UV Skinz Size 6

View Product: UV Skinz Size 6

UV Skinz

Size 6
$11.99 $38

$9.59 20% off with

Circo Size 18 mo
Circo Size 18 mo

View Product: Circo Size 18 mo

Circo

Size 18 mo
$6.99 $13
Baby Gap Size 6-12 mo
Baby Gap Size 6-12 mo

View Product: Baby Gap Size 6-12 mo

Baby Gap

Size 6-12 mo
$9.99 $25

$7.99 20% off with

Baby Gap Outlet Size 6-12 mo
Baby Gap Outlet Size 6-12 mo

View Product: Baby Gap Outlet Size 6-12 mo

Baby Gap Outlet

Size 6-12 mo
$6.99 $10
Flap Happy Size 4
Flap Happy Size 4

View Product: Flap Happy Size 4

Flap Happy

Size 4
$7.99 $13

$6.39 20% off with

Carter's Size 4T
Carter's Size 4T

View Product: Carter's Size 4T

Carter's

Size 4T
$10.99 $28

$8.79 20% off with

Baby Gap Size 3
Baby Gap Size 3

View Product: Baby Gap Size 3

Baby Gap

Size 3
$10.99 $25

$8.79 20% off with

KensieGirl Size 7
KensieGirl Size 7

View Product: KensieGirl Size 7

KensieGirl

Size 7
$12.99 $38

$10.39 20% off with

Zara Size 11
Zara Size 11

View Product: Zara Size 11

Zara

Size 11
$16.99 $38

$13.59 20% off with

Tea Size 6
Tea Size 6

View Product: Tea Size 6

Tea

Size 6
$16.99 $45

$13.59 20% off with

Hobie Size 12
Hobie Size 12

View Product: Hobie Size 12

Hobie

Size 12
$11.99 $31

$9.59 20% off with

Hanna Andersson Size 3
Hanna Andersson Size 3

View Product: Hanna Andersson Size 3

Hanna Andersson

Size 3
$16.99 $38

$13.59 20% off with

Wonder Nation Size 14
Wonder Nation Size 14

View Product: Wonder Nation Size 14

Wonder Nation

Size 14
$7.99 $15

$6.39 20% off with

Ruffle Butts Size 12
Ruffle Butts Size 12

View Product: Ruffle Butts Size 12

Ruffle Butts

Size 12
$8.99 $15

$7.19 20% off with

Carter's Size 2T
Carter's Size 2T

View Product: Carter's Size 2T

Carter's

Size 2T
$8.99 $24

$7.19 20% off with

SO Size 7
SO Size 7

View Product: SO Size 7

SO

Size 7
$9.99 $23

$7.99 20% off with

Carter's Size 4T
Carter's Size 4T

View Product: Carter's Size 4T

Carter's

Size 4T
$12.99 $36

$10.39 20% off with

Dolfin Size 4
Dolfin Size 4

View Product: Dolfin Size 4

Dolfin

Size 4
$7.99 $16

$6.39 20% off with

Disneyland Resort Size Large tots
Disneyland Resort Size Large tots

View Product: Disneyland Resort Size Large tots

Disneyland Resort

Size Large tots
$9.99 $26

$7.99 20% off with

Carter's Size 18 mo
Carter's Size 18 mo

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$13.99 $34

$11.19 20% off with

UV Skinz Size 6
UV Skinz Size 6

View Product: UV Skinz Size 6

UV Skinz

Size 6
$12.99 $38

$10.39 20% off with

Baby Gap Size 18-24 mo
Baby Gap Size 18-24 mo

View Product: Baby Gap Size 18-24 mo

Baby Gap

Size 18-24 mo
$10.99 $25

$8.79 20% off with

Assorted Brands Size 6
Assorted Brands Size 6

View Product: Assorted Brands Size 6

Assorted Brands

Size 6
$13.99 $31

$11.19 20% off with

Speedo Size 12
Speedo Size 12

View Product: Speedo Size 12

Speedo

Size 12
$11.99 $23

$9.59 20% off with

Dolfin Size 14
Dolfin Size 14

View Product: Dolfin Size 14

Dolfin

Size 14
$9.99 $19

$7.99 20% off with

Lands' End Size 10
Lands' End Size 10

View Product: Lands' End Size 10

Lands' End

Size 10
$11.99 $23

$8.39 30% off with

Justice Size 7
Justice Size 7

View Product: Justice Size 7

Justice

Size 7
$12.99 $31

$9.09 30% off with

Hanna Andersson Size 130 cm
Hanna Andersson Size 130 cm

View Product: Hanna Andersson Size 130 cm

Hanna Andersson

Size 130 cm
$10.99 $38

$7.69 30% off with

Disney Size 3T
Disney Size 3T

View Product: Disney Size 3T

Disney

Size 3T
$9.99 $25

$6.99 30% off with

Mirella Size 8
Mirella Size 8

View Product: Mirella Size 8

Mirella

Size 8
$11.99 $38

$8.39 30% off with

Wonder Nation Size X-Large youth
Wonder Nation Size X-Large youth

View Product: Wonder Nation Size X-Large youth

Wonder Nation

Size X-Large youth
$6.99 $15
...