As of the 2000 United States Census, there were 128,094 people, 43,507 households, and 29,889 families residing in the county. The population density was 110 people per square mile (43/km²). There were 56,377 housing units at an average density of 49 per square mile (19/km²). The racial makeup of the county was 28.90% Race (U.S. census), 1.40% Race (U.S. census) or Race (U.S. census), 0.37% Race (U.S. census), 33.01% Race (U.S. census), 10.72% Race (U.S. census), 1.36% from race (U.S. census), and 22.24% from two or more races. 7.8% of the population were Race (U.S. census) or Race (U.S. census) of any race.. How many people are there per 20 square miles?