Historic 2000 Census Block Group polygons (have the same first digit of their four-digit identifiers within a census tract) for all of Pierce County, realigned to Pierce County roads, tax parcels, hydro, railroads, powerlines, etc. Population figures for race, ethnicity, median age, household size, household count, etc were downloaded from the US Census website and joined to this layer. Please read metadata for additional information (https://matterhorn.co.pierce.wa.us/GISmetadata/pdbis_census2000_block_groups.html). Any data download constitutes acceptance of the Terms of Use (https://matterhorn.co.pierce.wa.us/Disclaimer/PierceCountyGISDataTermsofUse.pdf).