 boone county is a county located in the u.s. state of illinois.as of the 2010 census, the population was 54,165. its county seat is belvidere. boone county is included in the rockford, il metropolitan statistical area. ==history== boone county was formed in 1837 out of winnebago county. it was named for kentucky frontiersman daniel boone. file:boone county illinois 1837.png|boone county at the time of its creation in 1837 ==geography== according to the u.s. census bureau, the county has a total area of , of which  is land and  (0.5%) is water. ===adjacent counties=== *rock county, wisconsin - north *walworth county, wisconsin - northeast *mchenry county - east *dekalb county - south *ogle county - southwest *winnebago county - west ===major highways=== * 25px interstate 90 * 25px us route 20 * 25px illinois route 76 * 25px illinois route 173 == climate and weather ==  in recent y
1837_establishments_in_Illinois Boone_County,_Illinois Illinois_counties Populated_places_established_in_1837 Rockford_metropolitan_area