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US county housing built before 1980, 2020–2024

Compare the share of housing built before 1980 across US counties and inspect the source construction-period estimates.

Preview of US county housing built before 1980, 2020–2024
US Census Bureau. 2020–2024 American Community Survey five-year estimates and 2024 cartographic county boundaries. Prepared 1 November 2026.

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The table shows up to eight fields. The download keeps all fields and the original geometry.

About this dataset

  • The map covers counties and county equivalents in the 50 states and the District of Columbia; it excludes Puerto Rico and other territories.
  • These are 2020–2024 five-year survey estimates, not measurements made on one day. Source margins of error and unavailable-value annotations are retained.
  • County data describes broad areas. It does not identify individual households or give exact values inside a drawn service area.
  • The 2024 county boundaries are transformed from NAD83 to WGS84 and simplified to 0.003 degrees for display. Small boundary details can be absent.
  • Derived percentages have no calculated margin of error; the source estimates and their 90% margins of error are retained.
  • Darker colours show larger values; grey means no estimate. Select a county to read its value and colour range.
  • Housing age does not describe building condition or prove that repairs are needed.

Source and licence

US Census Bureau

Licence: Public domain

GeoJSON download details

The download includes all 3,144 features as area groups, areas. Coordinates use longitude and latitude in WGS84.

The preparation date is when we prepared this dataset. Read the source notes for the dates covered by the data.

GeoJSON fields 26
name
County or county-equivalent name.
county_fips
Five-digit Census county geographic identifier.
built_before_1980_pct
Estimated units built before 1980 divided by all housing units, as a percentage.
B25034_E001
Estimate: Total:.
B25034_M001
Margin of Error: Total: (90% confidence).
B25034_E002
Estimate: Total:: Built 2020 or later.
B25034_M002
Margin of Error: Total:: Built 2020 or later (90% confidence).
B25034_E003
Estimate: Total:: Built 2010 to 2019.
B25034_M003
Margin of Error: Total:: Built 2010 to 2019 (90% confidence).
B25034_E004
Estimate: Total:: Built 2000 to 2009.
B25034_M004
Margin of Error: Total:: Built 2000 to 2009 (90% confidence).
B25034_E005
Estimate: Total:: Built 1990 to 1999.
B25034_M005
Margin of Error: Total:: Built 1990 to 1999 (90% confidence).
B25034_E006
Estimate: Total:: Built 1980 to 1989.
B25034_M006
Margin of Error: Total:: Built 1980 to 1989 (90% confidence).
B25034_E007
Estimate: Total:: Built 1970 to 1979.
B25034_M007
Margin of Error: Total:: Built 1970 to 1979 (90% confidence).
B25034_E008
Estimate: Total:: Built 1960 to 1969.
B25034_M008
Margin of Error: Total:: Built 1960 to 1969 (90% confidence).
B25034_E009
Estimate: Total:: Built 1950 to 1959.
B25034_M009
Margin of Error: Total:: Built 1950 to 1959 (90% confidence).
B25034_E010
Estimate: Total:: Built 1940 to 1949.
B25034_M010
Margin of Error: Total:: Built 1940 to 1949 (90% confidence).
B25034_E011
Estimate: Total:: Built 1939 or earlier.
B25034_M011
Margin of Error: Total:: Built 1939 or earlier (90% confidence).
value_range
Display range used for the feature colour; not an additional source estimate.