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.

240 items
Assorted Brands Size Small kids
Price Drop BadgePrice Drop

View Product: Assorted Brands Size Small kids

Assorted Brands

Size Small kids
$15.99 $51

$7.99 50% off with

Gymboree Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 12-18 mo

Gymboree

Size 12-18 mo
$6.99 $22
Gymboree Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Gymboree Size 12-18 mo

Gymboree

Size 12-18 mo
$5.99 $22
Old Navy Size 0-3 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 0-3 mo

Old Navy

Size 0-3 mo
$6.99 $13
Marvel Size 12 mo
Price Drop BadgePrice Drop

View Product: Marvel Size 12 mo

Marvel

Size 12 mo
$6.99 $14
Nautica Size 3T
Price Drop BadgePrice Drop

View Product: Nautica Size 3T

Nautica

Size 3T
$7.99 $26

$6.39 20% off with

Carter's Size 18 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$7.99 $28

$6.39 20% off with

J. McLaughlin Size X-Large kids
Price Drop BadgePrice Drop

View Product: J. McLaughlin Size X-Large kids

J. McLaughlin

Size X-Large kids
$19.99 $58

$11.99 40% off with

Hanna Andersson Size 80 cm
Price Drop BadgePrice Drop

View Product: Hanna Andersson Size 80 cm

Hanna Andersson

Size 80 cm
$16.99 $38

$10.19 40% off with

Jumping Beans Size 4
Price Drop BadgePrice Drop

View Product: Jumping Beans Size 4

Jumping Beans

Size 4
$8.99 $26

$6.29 30% off with

Unbranded Size Small youth
Price Drop BadgePrice Drop

View Product: Unbranded Size Small youth

Unbranded

Size Small youth
$8.99 $31

$6.29 30% off with

Carter's Size 3 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 3 mo

Carter's

Size 3 mo
$5.99 $24
Baby Gap Size 12-18 mo
Price Drop BadgePrice Drop

View Product: Baby Gap Size 12-18 mo

Baby Gap

Size 12-18 mo
$7.99 $20

$6.39 20% off with

Assorted Brands Size Medium infants
Price Drop BadgePrice Drop

View Product: Assorted Brands Size Medium infants

Assorted Brands

Size Medium infants
$7.99 $20

$6.39 20% off with

Carter's Size 5T
Price Drop BadgePrice Drop

View Product: Carter's Size 5T

Carter's

Size 5T
$7.99 $28

$6.39 20% off with

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

Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$7.99 $24

$6.39 20% off with

J.Crew Size 6-12 mo
Price Drop BadgePrice Drop

View Product: J.Crew Size 6-12 mo

J.Crew

Size 6-12 mo
$7.99 $20

$6.39 20% off with

Nike Size Medium kids
Price Drop BadgePrice Drop

View Product: Nike Size Medium kids

Nike

Size Medium kids
$10.99 $36

$6.59 40% off with

Old Navy Size 6-12 mo
Price Drop BadgePrice Drop

View Product: Old Navy Size 6-12 mo

Old Navy

Size 6-12 mo
$8.99 $20

$6.29 30% off with

Hanna Andersson Size 60 cm
Price Drop BadgePrice Drop

View Product: Hanna Andersson Size 60 cm

Hanna Andersson

Size 60 cm
$9.99 $38

$5.99 40% off with

Xtreme Size 4T
Price Drop BadgePrice Drop

View Product: Xtreme Size 4T

Xtreme

Size 4T
$9.99 $41

$5.99 40% off with

Carter's Size 18 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 18 mo

Carter's

Size 18 mo
$8.99 $28

$6.29 30% off with

Kiko & Max Size 24 mo
Price Drop BadgePrice Drop

View Product: Kiko & Max Size 24 mo

Kiko & Max

Size 24 mo
$6.99 $17
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
Carter's Size Newborn
Price Drop BadgePrice Drop

View Product: Carter's Size Newborn

Carter's

Size Newborn
$5.99 $24
Unbranded Size 50 cm
Price Drop BadgePrice Drop

View Product: Unbranded Size 50 cm

Unbranded

Size 50 cm
$9.99 $41

$5.99 40% off with

Tommy Bahama Size 18 mo
Price Drop BadgePrice Drop

View Product: Tommy Bahama Size 18 mo

Tommy Bahama

Size 18 mo
$5.99 $17
The Children's Place Size 3-6 mo
Price Drop BadgePrice Drop

View Product: The Children's Place Size 3-6 mo

The Children's Place

Size 3-6 mo
$7.99 $15

$6.39 20% off with

OshKosh B'gosh Size 12-18 mo
Price Drop BadgePrice Drop

View Product: OshKosh B'gosh Size 12-18 mo

OshKosh B'gosh

Size 12-18 mo
$6.99 $18
Mudpie Baby Size 4T
Price Drop BadgePrice Drop

View Product: Mudpie Baby Size 4T

Mudpie Baby

Size 4T
$25.99 $77

$15.59 40% off with

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
Carter's Size 6 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$6.99 $24
Hanna Andersson Size 80 cm
Price Drop BadgePrice Drop

View Product: Hanna Andersson Size 80 cm

Hanna Andersson

Size 80 cm
$11.99 $38

$5.99 50% off with

Assorted Brands Size X-Small  kids
Price Drop BadgePrice Drop

View Product: Assorted Brands Size X-Small kids

Assorted Brands

Size X-Small kids
$7.99 $17

$6.39 20% off with

Sunshine Zone Size 4T
Price Drop BadgePrice Drop

View Product: Sunshine Zone Size 4T

Sunshine Zone

Size 4T
$10.99 $26

$6.59 40% off with

Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$9.99 $41

$5.99 40% off with

Carter's Size 12 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 12 mo

Carter's

Size 12 mo
$16.99 $41

$10.19 40% off with

Unbranded Size X-Large youth
Price Drop BadgePrice Drop

View Product: Unbranded Size X-Large youth

Unbranded

Size X-Large youth
$12.99 $31

$6.49 50% off with

Pipeline Size 5
Price Drop BadgePrice Drop

View Product: Pipeline Size 5

Pipeline

Size 5
$7.99 $21

$6.39 20% off with

Hanna Andersson Size 80 cm
Price Drop BadgePrice Drop

View Product: Hanna Andersson Size 80 cm

Hanna Andersson

Size 80 cm
$10.99 $28

$6.59 40% off with

Carter's Size 6 mo
Price Drop BadgePrice Drop

View Product: Carter's Size 6 mo

Carter's

Size 6 mo
$8.99 $24

$6.29 30% off with

REI Size 12
Price Drop BadgePrice Drop

View Product: REI Size 12

REI

Size 12
$10.99 $38

$6.59 40% off with

Kola Kids Size 0-3 mo
Price Drop BadgePrice Drop

View Product: Kola Kids Size 0-3 mo

Kola Kids

Size 0-3 mo
$10.99 $30

$6.59 40% off with

Junk Food Size X-Small youth
Price Drop BadgePrice Drop

View Product: Junk Food Size X-Small youth

Junk Food

Size X-Small youth
$10.99 $38

$6.59 40% off with

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
Baby Buns Size 18 mo
Price Drop BadgePrice Drop

View Product: Baby Buns Size 18 mo

Baby Buns

Size 18 mo
$6.99 $20
Carter's Size Up to 7lbs
Price Drop BadgePrice Drop

View Product: Carter's Size Up to 7lbs

Carter's

Size Up to 7lbs
$5.99 $24
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
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