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

Boys' Swimwear

ChevronNavigation chevron icon

Whether it's a day at the pool or the beach, your little man needs a comfortable and stylish look. At thredUP, you'll find boys' swimwear in a variety of styles, colors, and designs that he will love, and at up to 90% off estimated retail, the prices will make you happy as well.

466 items
Andy & Evan Size 4T
Andy & Evan Size 4T
Price Drop BadgePrice Drop

View Product: Andy & Evan Size 4T

Andy & Evan

Size 4T
$11.99 $64

$7.19 40% off with

Simple Joys by Carter's Size 18 mo
Simple Joys by Carter's Size 18 mo
Price Drop BadgePrice Drop

View Product: Simple Joys by Carter's Size 18 mo

Simple Joys by Carter's

Size 18 mo
$3.99 $10
Baby Gap Size 3-6 mo
Baby Gap Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Baby Gap Size 3-6 mo

Baby Gap

Size 3-6 mo
$3.99 $20
Sesame Street Size 12 mo
Sesame Street Size 12 mo
Price Drop BadgePrice Drop

View Product: Sesame Street Size 12 mo

Sesame Street

Size 12 mo
$4.99 $10
Old Navy Size 12-18 mo
Old Navy Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 12-18 mo

Old Navy

Size 12-18 mo
$3.99 $15
I Play Size 12 mo
I Play Size 12 mo
Price Drop BadgePrice Drop

View Product: I Play Size 12 mo

I Play

Size 12 mo
$3.99 $10
Unbranded Size 10
Unbranded Size 10
Price Drop BadgePrice Drop

View Product: Unbranded Size 10

Unbranded

Size 10
$3.99 $20
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 $15
Lands' End Size 8
Lands' End Size 8
Price Drop BadgePrice Drop

View Product: Lands' End Size 8

Lands' End

Size 8
$7.99 $25

$6.39 20% off with

Quiksilver Size 7
Quiksilver Size 7
Price Drop BadgePrice Drop

View Product: Quiksilver Size 7

Quiksilver

Size 7
$5.99 $20
The Children's Place Size 12 mo
The Children's Place Size 12 mo
Price Drop BadgePrice Drop

View Product: The Children's Place Size 12 mo

The Children's Place

Size 12 mo
$3.99 $15
Kanu Surf Size 8
Kanu Surf Size 8
Price Drop BadgePrice Drop

View Product: Kanu Surf Size 8

Kanu Surf

Size 8
$9.99 $31

$5.99 40% off with

The Children's Place Size 0-3 mo
The Children's Place Size 0-3 mo
Price Drop BadgePrice Drop

View Product: The Children's Place Size 0-3 mo

The Children's Place

Size 0-3 mo
$4.99 $15
Old Navy Size 0-3 mo
Old Navy Size 0-3 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 0-3 mo

Old Navy

Size 0-3 mo
$5.99 $13
Nano Size 12 mo
Nano Size 12 mo
Price Drop BadgePrice Drop

View Product: Nano Size 12 mo

Nano

Size 12 mo
$4.99 $20
Unbranded Size 3-6 mo
Unbranded Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Unbranded Size 3-6 mo

Unbranded

Size 3-6 mo
$5.99 $20
Unbranded Size 3-6 mo
Unbranded Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Unbranded Size 3-6 mo

Unbranded

Size 3-6 mo
$5.99 $14
Spotted Zebra Size X-Small  kids
Spotted Zebra Size X-Small  kids
Price Drop BadgePrice Drop

View Product: Spotted Zebra Size X-Small kids

Spotted Zebra

Size X-Small kids
$5.99 $17
Little Me Size 12 mo
Little Me Size 12 mo
Price Drop BadgePrice Drop

View Product: Little Me Size 12 mo

Little Me

Size 12 mo
$10.99 $31

$6.59 40% off with

Carter's Size 2T
Carter's Size 2T
Price Drop BadgePrice Drop

View Product: Carter's Size 2T

Carter's

Size 2T
$9.99 $24

$5.99 40% off with

Old Navy Size 0-3 mo
Old Navy Size 0-3 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 0-3 mo

Old Navy

Size 0-3 mo
$5.99 $13
Carter's Size 3-6 mo
Carter's Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 3-6 mo

Carter's

Size 3-6 mo
$7.99 $24

$6.39 20% off with

Koala Kids Size 12 mo
Koala Kids Size 12 mo
Price Drop BadgePrice Drop

View Product: Koala Kids Size 12 mo

Koala Kids

Size 12 mo
$5.99 $10
Gymboree Size 3-6 mo
Gymboree Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 3-6 mo

Gymboree

Size 3-6 mo
$8.99 $22

$6.29 30% off with

Carter's Size 12 mo
Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$8.99 $28

$6.29 30% off with

Old Navy Size 12-18 mo
Old Navy Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 12-18 mo

Old Navy

Size 12-18 mo
$5.99 $13
Gymboree Size 18-24 mo
Gymboree Size 18-24 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 18-24 mo

Gymboree

Size 18-24 mo
$7.99 $25

$6.39 20% off with

Carter's Size 12 mo
Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$8.99 $24

$6.29 30% off with

Carter's Size 12 mo
Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$7.99 $28

$6.39 20% off with

Wonder Nation Size 0-3 mo
Wonder Nation Size 0-3 mo
Price Drop BadgePrice Drop

View Product: Wonder Nation Size 0-3 mo

Wonder Nation

Size 0-3 mo
$4.99 $7
ZeroXposur Size 4
ZeroXposur Size 4
Price Drop BadgePrice Drop

View Product: ZeroXposur Size 4

ZeroXposur

Size 4
$5.99 $21
Carter's Size 3 mo
Carter's Size 3 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$7.99 $24

$6.39 20% off with

Lands' End Size Small infants
Lands' End Size Small infants
Price Drop BadgePrice Drop

View Product: Lands' End Size Small infants

Lands' End

Size Small infants
$8.99 $23

$6.29 30% off with

OshKosh B'gosh Size 3-6 mo
OshKosh B'gosh Size 3-6 mo
Price Drop BadgePrice Drop

View Product: OshKosh B'gosh Size 3-6 mo

OshKosh B'gosh

Size 3-6 mo
$6.99 $18
Baby Gap Size 4
Baby Gap Size 4
Price Drop BadgePrice Drop

View Product: Baby Gap Size 4

Baby Gap

Size 4
$7.99 $20

$6.39 20% off with

Baby Buns Size 6 mo
Baby Buns Size 6 mo
Price Drop BadgePrice Drop

View Product: Baby Buns Size 6 mo

Baby Buns

Size 6 mo
$6.99 $14
Truly Scrumptious By Heidi Klum Size 6 mo
Truly Scrumptious By Heidi Klum Size 6 mo
Price Drop BadgePrice Drop

View Product: Truly Scrumptious By Heidi Klum Size 6 mo
Baby Buns Size 24 mo
Baby Buns Size 24 mo
Price Drop BadgePrice Drop

View Product: Baby Buns Size 24 mo

Baby Buns

Size 24 mo
$4.99 $14
Carter's Size 24 mo
Carter's Size 24 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$8.99 $28

$6.29 30% off with

Unbranded Size 12-18 mo
Unbranded Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Unbranded Size 12-18 mo

Unbranded

Size 12-18 mo
$13.99 $41

$8.39 40% off with

UV Skinz Size 12-18 mo
UV Skinz Size 12-18 mo
Price Drop BadgePrice Drop

View Product: UV Skinz Size 12-18 mo

UV Skinz

Size 12-18 mo
$6.99 $26
Baby Gap Size 3-6 mo
Baby Gap Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Baby Gap Size 3-6 mo

Baby Gap

Size 3-6 mo
$6.99 $20
Koala Baby Size 12 mo
Koala Baby Size 12 mo
Price Drop BadgePrice Drop

View Product: Koala Baby Size 12 mo

Koala Baby

Size 12 mo
$7.99 $10

$6.39 20% off with

Assorted Brands Size 4T
Assorted Brands Size 4T
Price Drop BadgePrice Drop

View Product: Assorted Brands Size 4T

Assorted Brands

Size 4T
$5.99 $17
The Children's Place Size 4T
The Children's Place Size 4T
Price Drop BadgePrice Drop

View Product: The Children's Place Size 4T

The Children's Place

Size 4T
$4.99 $15
Hanna Andersson Size 70 cm
Hanna Andersson Size 70 cm
Price Drop BadgePrice Drop

View Product: Hanna Andersson Size 70 cm

Hanna Andersson

Size 70 cm
$9.99 $28

$5.99 40% off with

OshKosh B'gosh Size 12 mo
OshKosh B'gosh Size 12 mo
Price Drop BadgePrice Drop

View Product: OshKosh B'gosh Size 12 mo

OshKosh B'gosh

Size 12 mo
$5.99 $18
Floatimini Size 3 mo
Floatimini Size 3 mo
Price Drop BadgePrice Drop

View Product: Floatimini Size 3 mo

Floatimini

Size 3 mo
$14.99 $51

$8.99 40% off with

Carter's Size 12 mo
Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$5.99 $28
Baby Gap Size 3T
Baby Gap Size 3T
Price Drop BadgePrice Drop

View Product: Baby Gap Size 3T

Baby Gap

Size 3T
$7.99 $20

$6.39 20% off with

Angry Birds Size 12 mo
Angry Birds Size 12 mo
Price Drop BadgePrice Drop

View Product: Angry Birds Size 12 mo

Angry Birds

Size 12 mo
$4.99 $7
Gymboree Size 18-24 mo
Gymboree Size 18-24 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 18-24 mo

Gymboree

Size 18-24 mo
$8.99 $25

$6.29 30% off with

Baby Gap Size 18-24 mo
Baby Gap Size 18-24 mo
Price Drop BadgePrice Drop

View Product: Baby Gap Size 18-24 mo

Baby Gap

Size 18-24 mo
$6.99 $20
Carter's Size 12 mo
Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$7.99 $28

$6.39 20% off with

Mambo Size 12-18 mo
Mambo Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Mambo Size 12-18 mo

Mambo

Size 12-18 mo
$4.99 $14
Baby Gap Size 12-18 mo
Baby Gap Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Baby Gap Size 12-18 mo

Baby Gap

Size 12-18 mo
$6.99 $20
Skechers Size 3T
Skechers Size 3T
Price Drop BadgePrice Drop

View Product: Skechers Size 3T

Skechers

Size 3T
$7.99 $21

$6.39 20% off with

UV Skinz Size 4T
UV Skinz Size 4T
Price Drop BadgePrice Drop

View Product: UV Skinz Size 4T

UV Skinz

Size 4T
$7.99 $21

$6.39 20% off with

Carter's Size 18 mo
Carter's Size 18 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$7.99 $24

$6.39 20% off with

Unbranded Size 3-6 mo
Unbranded Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Unbranded Size 3-6 mo

Unbranded

Size 3-6 mo
$4.99 $14
Make A Splash Swimwear Size 3-6 mo
Make A Splash Swimwear Size 3-6 mo
Price Drop BadgePrice Drop

View Product: Make A Splash Swimwear Size 3-6 mo

Make A Splash Swimwear

Size 3-6 mo
$7.99 $15

$6.39 20% off with

Baby Gap Size 6-12 mo
Baby Gap Size 6-12 mo
Price Drop BadgePrice Drop

View Product: Baby Gap Size 6-12 mo

Baby Gap

Size 6-12 mo
$9.99 $20

$5.99 40% off with

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
$5.99 $15
Carter's Size 24 mo
Carter's Size 24 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 24 mo

Carter's

Size 24 mo
$7.99 $24

$6.39 20% off with

Gymboree Size 18-24 mo
Gymboree Size 18-24 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 18-24 mo

Gymboree

Size 18-24 mo
$9.99 $25

$5.99 40% off with

Baby Gap Size 6-12 mo
Baby Gap Size 6-12 mo
Price Drop BadgePrice Drop

View Product: Baby Gap Size 6-12 mo

Baby Gap

Size 6-12 mo
$6.99 $20
Crazy 8 Size 18-24 mo
Crazy 8 Size 18-24 mo
Price Drop BadgePrice Drop

View Product: Crazy 8 Size 18-24 mo

Crazy 8

Size 18-24 mo
$5.99 $17
Carter's Size 18 mo
Carter's Size 18 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$9.99 $24

$5.99 40% off with

Gymboree Size 6-12 mo
Gymboree Size 6-12 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 6-12 mo

Gymboree

Size 6-12 mo
$6.99 $25
Janie and Jack Size 6-12 mo
Janie and Jack Size 6-12 mo
Price Drop BadgePrice Drop

View Product: Janie and Jack Size 6-12 mo

Janie and Jack

Size 6-12 mo
$9.99 $29

$5.99 40% off with

OshKosh B'gosh Size 18 mo
OshKosh B'gosh Size 18 mo
Price Drop BadgePrice Drop

View Product: OshKosh B'gosh Size 18 mo

OshKosh B'gosh

Size 18 mo
$4.99 $21
ZeroXposur Size Small youth
ZeroXposur Size Small youth
Price Drop BadgePrice Drop

View Product: ZeroXposur Size Small youth

ZeroXposur

Size Small youth
$9.99 $26

$5.99 40% off with

Gymboree Size 3T
Gymboree Size 3T
Price Drop BadgePrice Drop

View Product: Gymboree Size 3T

Gymboree

Size 3T
$9.99 $22

$5.99 40% off with

Unbranded Size Small infants
Unbranded Size Small infants
Price Drop BadgePrice Drop

View Product: Unbranded Size Small infants

Unbranded

Size Small infants
$4.99 $14
Crazy 8 Size 12-18 mo
Crazy 8 Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Crazy 8 Size 12-18 mo

Crazy 8

Size 12-18 mo
$4.99 $17
UV Skinz Size 12-18 mo
UV Skinz Size 12-18 mo
Price Drop BadgePrice Drop

View Product: UV Skinz Size 12-18 mo

UV Skinz

Size 12-18 mo
$4.99 $17
Gymboree Size 12-18 mo
Gymboree Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 12-18 mo

Gymboree

Size 12-18 mo
$4.99 $22
Gymboree Size 12-18 mo
Gymboree Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 12-18 mo

Gymboree

Size 12-18 mo
$4.99 $25
Circo Size 18 mo
Circo Size 18 mo
Price Drop BadgePrice Drop

View Product: Circo Size 18 mo

Circo

Size 18 mo
$5.99 $10
I Play Size 3-6 mo
I Play Size 3-6 mo
Price Drop BadgePrice Drop

View Product: I Play Size 3-6 mo

I Play

Size 3-6 mo
$5.99 $10
Carter's Size 3 mo
Carter's Size 3 mo
Price Drop BadgePrice Drop