| Kidstock | | Clothing, shoes, bedding, furniture, toys and accessories. |
| KidSurplus.com | | Discounts on clothing, toys and bedding due to store closings, liquidations and overstock. |
| Kidz Square | | Dress and casual clothing for boys and girls, infants to size 20. |
| Kidzone | | Offers name brand casual childrenswear in sizes infant through pre-teen. |
| KiKiBay | | Offers European and US designer apparel and accessories, as well as room decor. |
| Kip Kids | | Children's tee-shirts, shorts, infant rompers, and dresses with colorful designs. |
| Klassy Kids Clothes | | Clothing and accessories ranging from chique-casual to ultra special occasion. |
| KoolSun UV | | Offering a line of sun protective clothes, swimsuits, shoes, and sunglasses for children 6 months to 12 years. |
| Kule | | Classic apparel for children ages 12 months to 10 years. |
| Laughing Bear Batik | | Handmade cotton dresses, long john sets, tee shirts, overalls, and outfits for children and adults in bright colors, batiked with various designs. |
| Libella Bedwear | | Children's pajamas and bedtime accessories. European and American sizes. Bedtime stories. |
| Lids for Kids | | Hats and clothing accessories for summer and winter. |
| Lil Threads | | Boys and girls apparel sized from newborn to 6. |
| Little Acorns | | Offers clothes with U.V. protection and practical designs for boys and girls up to size 10. |
| Little Darlings | | New Zealand site offering clothes and accessories in sizes newborn to toddler. |
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