Brown University Longitudinal Tract Database (LTDB) - Longitudinal, tract-boundary consistent census dataset from 1970-present. Includes race and Hispanic origin, age by race and Hispanic origin, household composition, and housing occupancy and tenure plus socioeconomic characteristics from the American Community Survey. See the associated variable codebook.
ESRI’s Tapestry Project - Classification of U.S. residential neighborhoods into marketing segments based on demographic and socio-economic data
History Quest DC - Interactive GIS map with historical data on approximately 127,000 extant buildings in Washington, D.C.
Mapping Inequality: Redlining in New Deal America - Home Owners' Loan Corporation (HOLC) georeferenced maps and polygons from 1935-1940 for a variety of cities in the United States. HOLC recruited mortgage lenders, developers, and real estate appraisers to create maps that color-coded credit worthiness and risk.