Old Navy girls swimsuits are made for comfort and quality at an affordable price. You'll find girls swimsuits in tankinis, bikinis or boy shorts. These swimsuits come in trendy designs with tops that include racerback or halter and stylish bottoms with belts. Find the one she'll want to spend hours in lounging at the beach or by the pool. Shop Old Navy deals for a girls swimsuit that will have her ready for warm weather in a snap.