This dataset is a polygon layer providing boundary and demographic statistical data for 5-digit ZIP code areas for District of Columbia (Washington, D.C.), 1995. The demographic data set includes attributes covering: age and sex distribution, ethnicity and ancestry, education, income, industry employment, household size, type of housing unit, home ownership, home value, and mortgage statistics, automobile ownership, and home heating fuel types. Individual demographic and marketing datasets for all 50 states plus the District of Columbia at both the Census tract and ZIP code level were derived from MaconUSA's 'Maps and Data for Microsoft Office 95', published in 1996. State and county-level demographic and marketing layers were also derived from the "Maps and data" dataset. Original dataset sources include: the Claritas Update, the U.S. Bureau of Labor Statistics, the U.S. Census Bureau, various other federal, state, and local governmental agencies, and businesses.