Social Data Commons: Population Demographics: Age, Gender, and Race (v1.0.0)

Overview Population age, gender, and race/ethnicity distributions from ACS tables B01001 (Sex by Age), B02001 (Race), and B03003 (Hispanic or Latino Origin), providing counts and percentages at block group, tract, and county levels. All measures are standardized to 2020 Census geographies using area-weighted crosswalks, enabling consistent multi-year analysis from 2009 to 2024. This dataset is produced by the Social Data Commons at the University of Virginia as part of the Population Demographics data pipeline. Provenance Directly tabulated from ACS 5-year estimates, table B01001 (Sex by Age). Female counts are from variable B01001_026. Values are available at Census tract, county, and block group levels on Census 2020 geography boundaries. Pre-2020 values have been standardized to 2020 boundaries using area-weighted crosswalks. Calculated from ACS 5-year estimates, table B01001 (Sex by Age). Female counts (B01001_026) divided by total population (B01001_001). Values are available at Census tract, county, and block group levels on Census 2020 geography boundaries. Pre-2020 values have been standardized to 2020 boundaries using area-weighted crosswalks. Directly tabulated from ACS 5-year estimates, table B01001 (Sex by Age). Male counts are from variable B01001_002. Values are available at Census tract, county, and block group levels on Census 2020 geography boundaries. Pre-2020 values have been standardized to 2020 boundaries using area-weighted crosswalks. Calculated from ACS 5-year estimates, table B01001 (Sex by Age). Male counts (B01001_002) divided by total population (B01001_001). Values are available at Census tract, county, and block group levels on Census 2020 geography boundaries. Pre-2020 values have been standardized to 2020 boundaries using area-weighted crosswalks. Directly tabulated from ACS 5-year estimates, table B01001 (Sex by Age), variable B01001_001 (total population). Values are available at Census tract, county, and block group levels on Census 2020 geography boundaries. Pre-2020 values have been standardized to 2020 boundaries using area-weighted crosswalks. Directly tabulated from ACS 5-year estimates, table B01001 (Sex by Age). Age groups computed by summing sex-specific single-year age variables. Percentages calculated relative to total population (B01001_001). Directly tabulated from ACS 5-year estimates, tables B02001 (Race) and B03003 (Hispanic or Latino Origin). Asian American/Pacific Islander is a combined category from B02001_005 (Asian alone) and B02001_006 (Native Hawaiian/Other Pacific Islander alone). Percentages are calculated relative to total population (B02001_001 for race, B03003_001 for ethnicity). Directly tabulated from ACS 5-year estimates, tables B02001 (Race) and B03003 (Hispanic or Latino Origin). Black or African American alone is B02001_003. Percentages are calculated relative to total population (B02001_001 for race, B03003_001 for ethnicity). Directly tabulated from ACS 5-year estimates, table B02001 (Race). Total population is B02001_001. Directly tabulated from ACS 5-year estimates, table B03003 (Hispanic or Latino Origin). Hispanic or Latino is B03003_003. Percentages are calculated relative to total population (B03003_001 for ethnicity). Directly tabulated from ACS 5-year estimates, tables B02001 (Race) and B03003 (Hispanic or Latino Origin). American Indian or Alaska Native alone is B02001_004. Percentages are calculated relative to total population (B02001_001 for race, B03003_001 for ethnicity). Directly tabulated from ACS 5-year estimates, tables B02001 (Race) and B03003 (Hispanic or Latino Origin). Some Other Race alone is B02001_007. Percentages are calculated relative to total population (B02001_001 for race, B03003_001 for ethnicity). Directly tabulated from ACS 5-year estimates, tables B02001 (Race) and B03003 (Hispanic or Latino Origin). Two or More Races is B02001_008. Percentages are calculated relative to total population (B02001_001 for race, B03003_001 for ethnicity). Directly tabulated from ACS 5-year estimates, tables B02001 (Race) and B03003 (Hispanic or Latino Origin). White alone is B02001_002. Percentages are calculated relative to total population (B02001_001 for race, B03003_001 for ethnicity). Methodology The count of female residents captures the size of the female population in a community. Gender-disaggregated population data is essential for planning services, allocating resources, and understanding demographic composition. The female population share measures the proportion of residents who are female. Significant departures from the statewide average can reflect local labor markets (e.g., military bases, college towns), age structure, or migration patterns. Total population count representing all residents regardless of gender. This baseline figure serves as the denominator for computing gender composition percentages and is essential for contextualizing a community's demographic profile. Changes in total population over time reflect broader trends in migration, development, and economic opportunity. The count of working-age residents (20-64) represents the primary labor force and tax base of a community. Changes in this group affect economic productivity, housing demand, and the ratio of dependents to workers. The count of older adult residents (65+) captures the number of residents who are seniors. Communities with large senior populations face growing demand for geriatric health services, accessible transportation, affordable housing, and age-friendly infrastructure. Total population count representing all residents across all age groups. This baseline figure serves as the denominator for computing age-group percentages and is essential for understanding the scale of a community's population. Changes in total population over time reflect broader trends in migration, development, and economic opportunity. The count of youth residents (under 20) captures the number of residents who are children and adolescents. Communities with large youth populations have greater demand for schools, childcare, pediatric health services, and family support programs. Count of Asian American/Pacific Islander residents in a community. Racial and ethnic composition data tracks the Asian American/Pacific Islander population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Racial and ethnic composition data tracks the Asian American/Pacific Islander population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Count of Black or African American residents in a community. Racial and ethnic composition data tracks the Black or African American population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Total population from the race/ethnicity table. This count serves as the denominator for calculating racial and ethnic composition percentages and provides the baseline population figure for a community. Count of Hispanic or Latino residents in a community. Racial and ethnic composition data tracks the Hispanic or Latino population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Count of American Indian or Alaska Native residents in a community. Racial and ethnic composition data tracks the American Indian or Alaska Native population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Count of residents identifying as Some Other Race alone in a community. Racial and ethnic composition data tracks the Some Other Race population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Count of residents identifying as Two or More Races in a community. Racial and ethnic composition data tracks the Two or More Races population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Count of White residents in a community. Racial and ethnic composition data tracks the White population in a community. Understanding demographic diversity is essential for equitable resource allocation, culturally competent service delivery, and monitoring disparities across groups. Source Tables 5-Year estimates, table B01001, via the API 5-Year estimates, tables B02001 and B03003, via the API Measures (27) Note on naming conventions: Measures containing _geo20 are computed using 2020 Census geographic boundaries. gender_female_count_geo20: The count of females in population. (arithmetic mean, unit: individual) Count of the female population. gender_female_percent_geo20: The percent of females in the total population. (percent, unit: individual) The percent of females in the total population. gender_male_count_geo20: The count of males in population. (arithmetic mean, unit: individual) Count of the male population. gender_male_percent_geo20: The percent of males in the total population. (percent, unit: individual) The percent of males in the total population. gender_total_count_geo20: Total count of the population. (arithmetic mean, unit: individual) Total count of the population. age_20_64_count_geo20: The population estimates between age 20 and 64. (arithmetic mean, unit: individual) Count of the population between age 20 and 64. age_20_64_percent_geo20: The population estimates between age 20 and 64. (percent, unit: individual) The percent of the population between age 20 and 64. age_65_plus_count_geo20: The population over age 64. (arithmetic mean, unit: individual) Count of the population over age 64. age_65_plus_percent_geo20: The percent of the population over age 64. (percent, unit: individual) The percent of the population over age 64. age_total_count_geo20: Total count of the population. (arithmetic mean, unit: individual) Total count of the population. age_under_20_count_geo20: The population estimates under age 20. (arithmetic mean, unit: individual) Count of the population under age 20. age_under_20_percent_geo20: The percent of the population under age 20. (percent, unit: individual) The percent of the population under age 20. race_AAPI_count_geo20: The Asian American/Pacific Islander population. (arithmetic mean, unit: individual) Count of the Asian American/Pacific Islander population. race_AAPI_percent_geo20: The Asian American/Pacific Islander population percent. (percent, unit: individual) The Asian American/Pacific Islander population percent. race_afr_amer_alone_count_geo20: The Black population. (arithmetic mean, unit: individual) Count of the Black or African American population. race_afr_amer_alone_percent_geo20: The Black population percent. (percent, unit: individual) The Black or African American population percent. race_total_count_geo20: Total count of the population. (arithmetic mean, unit: individual) Total count of the population. race_hispanic_or_latino_count_geo20: The Hispanic/Latino population. (arithmetic mean, unit: individual) Count of the Hispanic/Latino population. race_hispanic_or_latino_percent_geo20: The Hispanic/Latino population percent. (percent, unit: individual) The Hispanic/Latino population percent. race_native_alone_count_geo20: The Native population. (arithmetic mean, unit: individual) Count of the American Indian or Alaska Native population. race_native_alone_percent_geo20: The Native population percent. (percent, unit: individual) The American Indian or Alaska Native population percent. race_other_count_geo20: The Other racial population. (arithmetic mean, unit: individual) Count of the Other racial population. race_other_percent_geo20: The Other racial population percent. (percent, unit: individual) The Other racial population percent. race_two_or_more_count_geo20: The two or more races population. (arithmetic mean, unit: individual) Count of the Two or More Races population. race_two_or_more_percent_geo20: The two or more races population percent. (percent, unit: individual) The Two or More Races population percent. race_wht_alone_count_geo20: The White population. (arithmetic mean, unit: individual) Count of the White population. race_wht_alone_percent_geo20: The White population percent. (percent, unit: individual) The White population percent. Data Sources American Community Survey (accessed 2025) File Format Data files are provided as xz-compressed CSVs (.csv.xz) with the following columns: geoid, year, measure, value, moe (margin of error, where available), region_type, data_method (observed, modeled, scaled, interpolated, or extrapolated). A measure_info.json file provides per-measure metadata.