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Planning and DevelopmentUpdated Jun 3, 2026

ACS 5-Year Population Estimates by Age and Sex at Block Group Level (Harris, Fort Bend, Montgomery)

The American Community Survey (ACS) Population Estimates by age and sex spreadsheet provides male and female population counts at the Census Block Group level across three counties in the Greater Houston Metropolitan Area: Harris, Fort Bend, and Montgomery. These estimates are derived from five years of survey data collection, enabling analysis of the demographic makeup of small geographic areas.

Planning and DevelopmentUpdated May 7, 2026

City of Houston Population Estimates by Age and Sex

The American Community Survey (ACS) 1 Year and 5‑Year estimates for Houston, TX provides a detailed breakdown of the city’s residents by age, including groups such as under 5, 5–9, up to 85 and over. The ACS 5 Year estimates are based on surveys collected over a five year period, which produces more reliable statistics for smaller towns and neighborhoods due to a larger sample size. Use 5 Year Estimates for: Small geographic areas (tracts, block groups, neighborhoods), trend analysis when annual data is unavailable, and/or planning and policy decisions requiring higher reliability. Use 1 Year Estimates for: Large geographic areas (populations of 65,000 or more), more current data for cities, counties, and states, and/or trend analysis of annual data.