Amazon is adding Sunday delivery in Indianapolis along with 14 other cities.
Here's a full list of the cities:
Amazon has already been delivering on Sundays to New York and Los Angeles since November.
Amazon officials say the most common items delivered on Sunday are baby supplies such as newborn apparel, books and toys.
Mike Roth, Amazon's vice president of North America operations, calls Sunday delivery "crossing errands off the weekend to-do list."