U.S. Census Bureau ACS 5-Year Age and Sex (Block Group)

Population counts split by sex (male/female) across 23 age buckets per block group, plus margins of error. Buckets follow Census's groupings: under 5, 5-9, 10-14, 15-17, 18-19, 20, 21, 22-24, 25-29, 30-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-61, 62-64, 65-66, 67-69, 70-74, 75-79, 80-84, 85+. Total population and male-/female-total roll-ups are also included. Useful for deriving population pyramids, median age, working-age share, child share, senior share, and sex ratios at neighborhood granularity.

‍

Licensing and redistribution. U.S. Census Bureau data products are works of the United States Government and are not subject to copyright: "Copyright protection under this title is not available for any work of the United States Government" (17 U.S.C. § 105). Dewey redistributes this processed extract on that public-domain basis. The Census Bureau requests (but does not require) citation, and prohibits using the data to "identify any individual person, household, business or other entity" — a confidentiality obligation that passes through to users of this dataset. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.