 bull valley is an affluent village in mchenry county, illinois, united states. the population was 726 at the 2000 census.city data. 2000 census information retrieved on may 24, 2007 however, at the 2010 census, the population was at 1,077. 
Chicago_metropolitan_area Populated_places_established_in_the_1970s Villages_in_Illinois Villages_in_McHenry_County,_Illinois