As of the 2000 United States Census, there were 24,426 people, 9,342 households, and 6,511 families in Todd County. The population density was 25.8/sqmi (9.98/km2). There were 11,900 housing units at an average density of 12.6/sqmi (4.86/km2). The racial makeup of the county was 97.54% White, 0.11% Black or African American, 0.48% Native American, 0.31% Asian, 0.01% Pacific Islander, 0.72% from other races, and 0.82% from two or more races. 1.90% of the population were Hispanic or Latino of any race. 52.1% were of German, 11.3% Norwegian and 5.6% Polish ancestry.