Trending Categories
Trending Brands
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.
859 items
Sort by:
View Product: Shade Critters One Piece Swimsuit
Shade Critters
One Piece Swimsuit
Size 10
$22.99 $17.24 25% off with code THRIFT25
64% off estimated retailView Product: St. Eve Swim Swimsuit Cover Up
St. Eve Swim
Swimsuit Cover Up
Size 10
$14.99 $11.24 25% off with code THRIFT25
40% off estimated retailView Product: Hanna Andersson One Piece Swimsuit
Hanna Andersson
One Piece Swimsuit
Size Medium kids
$26.99 $20.24 25% off with code THRIFT25
34% off estimated retailView Product: Dolfin One Piece Swimsuit
Dolfin
One Piece Swimsuit
Size X-Large tots
$20.99 $15.74 25% off with code THRIFT25
44% off estimated retailView Product: Hanna Andersson One Piece Swimsuit
Hanna Andersson
One Piece Swimsuit
Size 8
$21.99 $16.49 25% off with code THRIFT25
46% off estimated retailView Product: Hanna Andersson One Piece Swimsuit
Hanna Andersson
One Piece Swimsuit
Size 8
$25.99 $19.49 25% off with code THRIFT25
36% off estimated retailView Product: Unbranded One Piece Swimsuit
Unbranded
One Piece Swimsuit
Size 100 cm
$16.99 $12.74 25% off with code THRIFT25
37% off estimated retailView Product: Carter's One Piece Swimsuit
Carter's
One Piece Swimsuit
Size 24 mo
$14.99 $11.24 25% off with code THRIFT25
58% off estimated retailView Product: Hanna Andersson Two Piece Swimsuit
Hanna Andersson
Two Piece Swimsuit
Size 8
$24.99 $18.74 25% off with code THRIFT25
39% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size 4T
$15.99 $11.99 25% off with code THRIFT25
40% off estimated retailView Product: Gymboree One Piece Swimsuit
Gymboree
One Piece Swimsuit
Size 18-24 mo
$18.99 $14.24 25% off with code THRIFT25
29% off estimated retailView Product: Unbranded One Piece Swimsuit
Unbranded
One Piece Swimsuit
Size 3-6 mo
$14.99 $11.24 25% off with code THRIFT25
31% off estimated retailView Product: Hanna Andersson Two Piece Swimsuit
Hanna Andersson
Two Piece Swimsuit
Size 6
$25.99 $19.49 25% off with code THRIFT25
36% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size 11
$12.99 $9.74 25% off with code THRIFT25
60% off estimated retailView Product: Matilda Jane One Piece Swimsuit
Matilda Jane
One Piece Swimsuit
Size 10
$14.99 $11.24 25% off with code THRIFT25
54% off estimated retailView Product: Cat & Jack One Piece Swimsuit
Cat & Jack
One Piece Swimsuit
Size 18 mo
$13.99 $10.49 25% off with code THRIFT25
17% off estimated retailView Product: Art Class One Piece Swimsuit
Art Class
One Piece Swimsuit
Size Large youth
$13.99 $10.49 25% off with code THRIFT25
30% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size 4
$15.99 $11.99 25% off with code THRIFT25
40% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 12
$15.99 $11.99 25% off with code THRIFT25
61% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 10
$15.99 $11.99 25% off with code THRIFT25
61% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 2T
$19.99 $14.99 25% off with code THRIFT25
52% off estimated retailView Product: Stella Cove One Piece Swimsuit
Stella Cove
One Piece Swimsuit
Size 12
$13.99 $10.49 25% off with code THRIFT25
65% off estimated retailView Product: Carter's One Piece Swimsuit
Carter's
One Piece Swimsuit
Size 24 mo
$14.99 $11.24 25% off with code THRIFT25
58% off estimated retailView Product: Abercrombie Two Piece Swimsuit
Abercrombie
Two Piece Swimsuit
Size 15
$16.99 $12.74 25% off with code THRIFT25
54% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 2T
$16.99 $12.74 25% off with code THRIFT25
59% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 2T
$17.99 $13.49 25% off with code THRIFT25
57% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 18-24 mo
$19.99 $14.99 25% off with code THRIFT25
52% off estimated retailView Product: Tommy Hilfiger One Piece Swimsuit
Tommy Hilfiger
One Piece Swimsuit
Size 8
$14.99 $11.24 25% off with code THRIFT25
63% off estimated retailView Product: Carter's One Piece Swimsuit
Carter's
One Piece Swimsuit
Size 18 mo
$14.99 $11.24 25% off with code THRIFT25
58% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size 8
$16.99 $12.74 25% off with code THRIFT25
48% off estimated retailView Product: Hanna Andersson One Piece Swimsuit
Hanna Andersson
One Piece Swimsuit
Size 4
$25.99 $19.49 25% off with code THRIFT25
36% off estimated retailView Product: Hanna Andersson Two Piece Swimsuit
Hanna Andersson
Two Piece Swimsuit
Size 90 cm
$20.99 $15.74 25% off with code THRIFT25
48% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 4
$15.99 $11.99 25% off with code THRIFT25
61% off estimated retailView Product: Carter's One Piece Swimsuit
Carter's
One Piece Swimsuit
Size 18 mo
$14.99 $11.24 25% off with code THRIFT25
58% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size 4
$12.99 $9.74 25% off with code THRIFT25
51% off estimated retailView Product: Gap Kids Two Piece Swimsuit
Gap Kids
Two Piece Swimsuit
Size Large youth
$14.99 $11.24 25% off with code THRIFT25
53% off estimated retailView Product: Vineyard Vines One Piece Swimsuit
Vineyard Vines
One Piece Swimsuit
Size 5
$13.99 $10.49 25% off with code THRIFT25
58% off estimated retailView Product: Unbranded One Piece Swimsuit
Unbranded
One Piece Swimsuit
Size 100 cm
$13.99 $10.49 25% off with code THRIFT25
48% off estimated retailView Product: Unbranded Two Piece Swimsuit
Unbranded
Two Piece Swimsuit
Size 100 cm
$14.99 $11.24 25% off with code THRIFT25
44% off estimated retailView Product: Little Creative Factory One Piece Swimsuit
Little Creative Factory
One Piece Swimsuit
Size 2
$25.99 $19.49 25% off with code THRIFT25
60% off estimated retailView Product: Baby Gap One Piece Swimsuit
Baby Gap
One Piece Swimsuit
Size 18-24 mo
$15.99 $11.99 25% off with code THRIFT25
40% off estimated retailView Product: Primary Clothing Wetsuit
Primary Clothing
Wetsuit
Size 12-18 mo
$13.99 $10.49 25% off with code THRIFT25
74% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size 5
$14.99 $11.24 25% off with code THRIFT25
44% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size Small youth
$14.99 $11.24 25% off with code THRIFT25
54% off estimated retailView Product: Assorted Brands One Piece Swimsuit
Assorted Brands
One Piece Swimsuit
Size 16
$14.99 $11.24 25% off with code THRIFT25
54% off estimated retailView Product: Janie and Jack Swimsuit Cover Up
Janie and Jack
Swimsuit Cover Up
Size 12
$16.99 $12.74 25% off with code THRIFT25
58% off estimated retailView Product: Nike One Piece Swimsuit
Nike
One Piece Swimsuit
Size Large youth
$16.99 $12.74 25% off with code THRIFT25
56% off estimated retailView Product: Hope & Henry One Piece Swimsuit
Hope & Henry
One Piece Swimsuit
Size 2T
$14.99 $11.24 25% off with code THRIFT25
31% off estimated retailView Product: Carter's One Piece Swimsuit
Carter's
One Piece Swimsuit
Size 24 mo
$16.99 $12.74 25% off with code THRIFT25
52% off estimated retailView Product: Janie and Jack One Piece Swimsuit
Janie and Jack
One Piece Swimsuit
Size 4
$17.99 $13.49 25% off with code THRIFT25
57% off estimated retailView Product: Janie and Jack Two Piece Swimsuit
Janie and Jack
Two Piece Swimsuit
Size 4
$16.99 $12.74 25% off with code THRIFT25
59% off estimated retailView Product: Penelope Mack One Piece Swimsuit
Penelope Mack
One Piece Swimsuit
Size 3T
$13.99 $10.49 25% off with code THRIFT25
48% off estimated retail