Richland is a small unincorporated community in Union County, South Dakota, United States. The population according to the 2010 Census was 89.
In 1861, the community was founded by and named after Milton M. Rich of Chicago. Mr. Rich was reported to have dreamed of building a community below the bluffs. However, it was also reported that Mr. Rich disagreed with railroad officials on how to divide the site of the town. The dispute was never resolved; and as a result, the railroad was deflected to Sioux City, Iowa after reaching Le Mars, Iowa.