Oldest housing stock, US counties
US counties ranked by oldest median year of construction (2024 ACS). St. Louis, Missouri leads at 1938. 3,144 counties qualify in total. Kansas carries 7 of the top 25 entries. The median across all 3,144 is 1979. Biggest climber in the top 100 since 2020: Logan County, NE, up 699 places to #97.
Flip the list · Newest housing stock, US counties →UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the lowest median year built?
St. Louis, Missouri ranks #1 with 1938 (2024 American Community Survey).
What are the top 5 counties by median year built?
St. Louis, Missouri, Loving County, Texas, Kalawao County, Hawaii, Lincoln County, Kansas, Franklin County, Nebraska.
How many counties are in this ranking?
3,144 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.
How is median year built measured?
Median year that housing structures were built. Source: US Census Bureau, American Community Survey 5-year estimates (2024).