Rio Dell, CA
Rio Dell (formerly, Rio Del and Eagle Prairie) is a city in Humboldt County, California, United States. Rio Dell is located on the west bank of the Eel River 1 mile (2 km) north of Scotia, at an elevation of 161 feet (49 m). The population was 3,363 at the 2010 census, up from 3,174 at the 2000 census.
According to the United States Census Bureau, the city has a total area of 2.4 square miles (6.3 km²), of which, 2.3 square miles (5.9 km2) of it is land and 0.1 square miles (0.4 km2) of it (5.61%) is water.
The first post office at Rio Dell opened in 1876. Rio Dell incorporated in 1965.