The population for the County of Jerome was estimated to be 21,262 (43% urban, 57% rural) in July 2009, with the male population estimated at 51.1% and females 48.9%

With a land area of 600 square miles the population density is 35 people per square mile.

The median resident age is 32.9 years, compared to the State median age of 33.2 years.

In December of 2009 cost of living index in Jerome County was estimated at 85.9 (less than average, U.S. average is 100).

Estimated median household income in 2008 was $43,934, up from $34,696 as reported in 1999.

The unemployment rate as of April 2010 was 8.3%, compared to the State of Idaho rate of 9.1%.

You can find more information on the County of Jerome, Idaho at City-Data.com.