For the 1940 Census, the Census Bureau compiled a separate report of unofficial, unincorporated communities of 500 or more people.[1] The Census Bureau officially defined this category as "unincorporated places" in the 1950 Census and used that term through the 1970 Census.[2] For the 1950 Census, these types of places were identified only outside "urbanized areas".[2] In 1960, the Census Bureau also identified unincorporated places inside urbanized areas (except in New England), but with a population of at least 10,000.[2] For the 1970 Census, the population threshold for "unincorporated places" in urbanized areas was reduced to 5,000.[2]