Riverdale is an unincorporated community in Sumner County, Kansas, United States.

[1] It is located about 6 miles southwest of Belle Plaine at the intersection of N Sand Plum Rd and 77th Ave N, or west of U.S. Route 81 next to the railroad.

[1] A post office was opened in Riverdale in 1887, and remained in operation until it was discontinued in 1973.

[2] A railroad currently passes through the community, north to south, from Wichita to Wellington.

Previously a railroad passed through the community, east to west, from Belle Plaine to Conway Springs.