Riverside and Avondale are two adjacent and closely associated neighborhoods, alternatively considered one continuous neighborhood, of Jacksonville, Florida. The area is primarily residential, but includes some commercial districts, including Five Points, the King Street District, and the Shoppes of Avondale.

There are more than 500 neighborhoods within the area of Jacksonville, Florida, the largest city in the contiguous United States by area. These include Downtown Jacksonville and surrounding neighborhoods. Additionally, greater Jacksonville is traditionally divided into several major sections with amorphous boundaries: Northside, Westside, Southside, and Arlington, as well as the Jacksonville Beaches.