Skip to top navigationSkip to shopping bagSkip to main contentSkip to product filtersSkip to footer links
Open & shop with your new Encore Credit Card & get an extra 30% off* your first purchase at Old Navy APPLY NOW
ONEPIECE ONESIES
144 items
Ribbed Braided-Strap One-Piece Swimsuit
$39.99$23.99
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed Braided-Strap One-Piece Swimsuit
$39.99$23.99
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed Braided-Strap One-Piece Swimsuit
$39.99$23.99
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed Braided-Strap One-Piece Swimsuit
$39.99$23.99
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Printed Sleeveless Henley One-Piece Romper for Baby
$19.99$12
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Printed Sleeveless Henley One-Piece Romper for Baby
$19.99$12
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Printed Sleeveless Henley One-Piece Romper for Baby
$19.99$12
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex Snug-Fit 2-Way-Zip Printed Pajama One-Piece for Toddler & Baby
$16.99$9
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex Snug-Fit 2-Way-Zip Printed Pajama One-Piece for Toddler & Baby
$16.99$9
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 2-Way-Zip Printed Pajama One-Piece for Toddler & Baby
$16.99$9
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 2-Way-Zip Printed Pajama One-Piece for Toddler & Baby
$16.99$9
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$14.99
70% Off
Clearance: Price as marked.
Unisex Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$14.99
70% Off
Clearance: Price as marked.
Unisex Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$14.99
70% Off
Clearance: Price as marked.
2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Snug-Fit 2-Way-Zip Ribbed Pajama One-Piece for Toddler & Baby
$16.99$3.47
80% Off
Clearance: Price as marked.
Snug-Fit 2-Way-Zip Ribbed Pajama One-Piece for Toddler & Baby
$16.99$4.49
74% Off
Clearance: Price as marked.
Unisex Snug-Fit 2-Way-Zip Printed Pajama One-Piece for Toddler & Baby
$16.99$8.49
50% Off
Clearance: Price as marked.
Unisex Snug-Fit 2-Way-Zip Printed Pajama One-Piece for Toddler & Baby
$16.99$5.49
68% Off
Clearance: Price as marked.
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Disney© Dumbo 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$19.99$11.99
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Disney© Dumbo 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$19.99$11.99
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Sleep & Play 2-Way-Zip Footed One-Piece 2-Pack for Baby
$29.99$16
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Sleep & Play 2-Way-Zip Footed One-Piece 2-Pack for Baby
$29.99$16
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Pointelle-Knit 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Pointelle-Knit 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 2-Way-Zip Sleep & Play Footed One-Piece 5-Pack for Baby
$74.99$40
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 2-Way-Zip Sleep & Play Footed One-Piece 5-Pack for Baby
$74.99$40
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 3-Pack Sleep & Play 2-Way-Zip Footed One-Piece for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 3-Pack Sleep & Play 2-Way-Zip Footed One-Piece for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Hello Kitty® Zip-Front Rashguard One-Piece Swimsuit for Toddler Girls
$29.99$17.99
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Short-Sleeve Ribbed Pocket One-Piece Romper 2-Pack for Baby
$34.99$20
43% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Short-Sleeve Ribbed Pocket One-Piece Romper 2-Pack for Baby
$34.99$20
43% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$12.99$1.47
89% Off
Clearance: Final sale. No returns or exchanges.
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$12.99$2.99
77% Off
Clearance: Final sale. No returns or exchanges.
Sleeveless Embroidered Sweater One-Piece Romper for Baby
$29.99$7.49
75% Off
Clearance: Price as marked.
Ruffle-Trim Jean One-Piece Romper for Baby
$24.99$15
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Long-Sleeve Critter Velvet One-Piece Romper for Baby
$32.99$4.97
85% Off
Clearance: Final sale. No returns or exchanges.
Star Wars™ Hooded Grogu Fleece One-Piece Romper for Baby
$39.99
Card Perk! 50% Off Original Price with Code: FIFTY
Sleeveless Sweater-Knit One-Piece Romper for Baby
$32.99
Today Only! 50% Off Original Price at Checkout
Star Wars™ Grogu Sleeveless Sweater-Knit One-Piece Romper for Baby
$39.99
Card Perk! 50% Off Original Price with Code: FIFTY
Short-Sleeve Sweater-Knit One-Piece Romper for Baby
$34.99$18
49% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Old Navy x Lovevery Snug-Fit 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex Caterpillar Print Sleep & Play 2-Way Zip Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ruffle-Trim 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Ruffle-Trim 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$14.99
70% Off
Clearance: Price as marked.
Ribbed 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$14.99$9
40% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$24.99
50% Off
Toddler & Baby Sale!
Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$24.99
50% Off
Toddler & Baby Sale!
Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$24.99
50% Off
Toddler & Baby Sale!
Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$24.99
50% Off
Toddler & Baby Sale!
Unisex 2-Way-Zip Sleep & Play Footed One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 1-Way Zip Sleep & Play One-Piece 3-Pack for Baby
$44.99$24
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Snug-Fit 2-Way-Zip Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$24.99
50% Off
Toddler & Baby Sale!
2-Way-Zip Sleep & Play Footed One-Piece 5-Pack for Baby
$74.99$18.97
75% Off
Clearance: Final sale. No returns or exchanges.
Disney© Dumbo Unisex Sleeveless Henley One-Piece Romper for Baby
$24.99$12.49
50% Off
Toddler & Baby Sale!
Unisex 2-Way-Zip Footie Sleep & Play One-Piece 5-Pack for Baby
$74.99$40
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex 2-Way-Zip Sleep & Play Footed One-Piece 2-Pack for Baby
$29.99$16
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Unisex Holiday Tree Costume Hooded One-Piece Romper for Baby
$32.99$4.97
85% Off
Clearance: Final sale. No returns or exchanges.
Snug-Fit 2-Way-Zip Footed One-Piece 3-Pack for Toddler & Baby
$49.99$12.49
75% Off
Clearance: Price as marked.
Snug-Fit 2-Way-Zip Ribbed Pajama One-Piece 3-Pack for Toddler & Baby
$49.99$24.99
50% Off
Toddler & Baby Sale!
Microfleece 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$12.99$1.97
85% Off
Clearance: Final sale. No returns or exchanges.
Unisex 2-Way-Zip Sleep & Play Footed One-Piece 2-Pack for Baby
$29.99$16
47% Off
Card Perk! 50% Off Original Price with Code: FIFTY
Microfleece 2-Way-Zip Sleep & Play Footed One-Piece for Baby
$12.99$1.47
89% Off
Clearance: Price as marked.
2-Way-Zip Sleep & Play Footed One-Piece 2-Pack for Baby
$29.99$8.99
70% Off
Clearance: Price as marked.
2-Way-Zip Microfleece Pajama One-Piece for Toddler & Baby
$19.99$2.97
85% Off
Clearance: Final sale. No returns or exchanges.
144 of 144 items
ONEPIECE ONESIES
Experience ultimate comfort and style with our collection of onepiece onesies, designed for lounging, sleeping, or simply enjoying a cozy day at home. These all-in-one garments combine the ease of a jumpsuit with the warmth of your favorite pajamas, making them perfect for any casual occasion. Crafted from soft, breathable fabrics, our onesies ensure you stay comfortable while looking effortlessly chic. Whether you're snuggling up on the couch or hosting a fun sleepover, these versatile pieces are a must-have for your wardrobe.
Our onepiece onesies come in a variety of styles, colors, and patterns to suit every personality. From playful prints to classic solids, there's something for everyone. Features like hoods, pockets, and zip closures add functionality and flair, allowing you to express your unique style while enjoying the convenience of an all-in-one outfit. The relaxed fit ensures ease of movement, making these onesies ideal for lounging or light activities.
Designed for all ages, onepiece onesies are perfect for family gatherings, pajama parties, or simply relaxing at home. They make great gifts for birthdays, holidays, or just because. With their fun designs and cozy materials, these onesies are sure to bring smiles and comfort to everyone who wears them. Plus, they’re easy to care for, ensuring that your favorite onesie stays soft and vibrant wash after wash.
Elevate your loungewear game with our stylish onepiece onesies that blend comfort and fashion effortlessly. Perfect for layering during colder months or wearing solo during warmer seasons, these versatile pieces are essential for any casual wardrobe. Explore our collection today and find the perfect onesie that matches your style and keeps you cozy all year round.