 The county has a diverse economy with no sector employing more than 13 % of the local workforce . Horseshoe Southern Indiana is the largest employer , followed by Tyson Foods and the Harrison County Hospital . Tourism also plays a significant role in the economy and is centered on the county 's many historic sites . County government is divided among several bodies including the boards of the county 's three school districts , three elected commissioners who exercise legislative and executive powers , an elected county council that controls the county budget , a circuit and superior court , and township trustees who oversee government function in the county 's 12 townships . The county has 10 incorporated towns with a total population of over 5 @,@ 000 , as well as many small unincorporated towns . One Interstate highway and one U. S. Route run through the county , as do eight Indiana State Roads and two railroad lines . 
