Shop for a maternity swimsuit from Old Navy designed for both comfort and a great way to show off your growing belly. With our selection of maternity swimsuits you'll find the style you want in everything from one-piece halter tops to tankinis and bikinis. Get the support and look that you want in a maternity swimsuit from Old Navy. Put together the maternity swim suits that you'll love to wear to the beach or pool at a price you can't beat -- get out and enjoy the summer fun. Each Old Navy maternity swimsuit is made with mom-to-be in mind, grab one or two today.