As of the census of 2000, there were 17,633 people, 5,923 households, and 4,874 families residing in Wilton. The population density was 654.3 people per square mile (252.6/km). There were 6,113 housing units at an average density of 226.8 per square mile (87.6/km). The racial makeup of the town was 95.55% White, 0.60% African American, 0.09% Native American, 2.69% Asian, 0.01% Pacific Islander, 0.27% from other races, and 0.79% from two or more races. Hispanic or Latino of any race were 1.53% of the population.