Richfield is a city in Lincoln County, Idaho, in the United States.

According to the United States Census Bureau, the city has a total area of 0.66 square miles (1.71 km2), all of it land.

[4] The Little Wood River flows nearby, and the Richfield region is supplied with irrigation water diverted from the Big Wood River near Magic Reservoir.

[5] A book about the History of the Richfield area was written in 1995 by Alice Crane Behr and Maureen Hancock Ward.

At the 2010 census there were 482 people in 172 households, including 124 families, in the city.

There were 195 housing units at an average density of 295.5 per square mile (114.1/km2).

There were 18 housing units at an average density of 36.8 per square mile (14.2/km2).