Census tracts are typically small subdivisions of communities that are delineated for the purposes of the US Census. Census tracts generally have a population size between 1,200 and 8,000 people. The size of a census tract van vary due to the population density of a given area. The US Census Bureau designs census tract boundaries to create relatively uniform areas of population characteristics, including economic and other similarities. Community surveys provide information about census tracts, which is used for several purposes, including designing community programs.