The county FIPS code is a concatenation of the two digit state number ("19" for Iowa) and three digit county code. State Code is based on INCITS 38:200x, Formerly FIPS 5-2. County Code is based on INCITS 31:200x Formerly FIPS 6-4.
This dataset facilitates adding five Iowa county FIPS codes, and standard short and long name spellings to other datasets. It provide a county reference field containing GNIS codes, three digit county FIPS, and county names using various spellings. Including county FIPS codes in data helps facilitate the creation of county choropleth maps.