 African-Americans were initially excluded, but were later included by the Greenbelt Committee for Fair Housing founded in 1963, and came to number 41% of residents, according to the 2000 census.The same census data also indicates that African-Americans are isolated in certain parts within the town and the percentage of African-Americans within the historic area is often between 0% and 5% on most blocks.Much of the federal government planned and developed portion of the city is located within the Greenbelt Historic District.