The 2000 U.S. census counted 35,073 residents in the 15.24-square-mile Chatsworth neighborhood—or 2,301 people per square mile, among the lowest population densities for both the city and the county. In 2008, the city estimated that the population had increased to 37,102. In 2000 the median age for residents was 40, considered old for city and county neighborhoods; the percentages of residents aged 35 and older were among the county's highest.