Rank

327of 3,144

Williamson, Tennessee

Score 7.13 / 10· population 264,460

Williamson County is Davidson County's neighbor in the Nashville metro area, with Franklin as its seat. Over 2020-2022, a resident could expect to live 81.5 years, eight years longer than the Tennessee average, and the median household earned $144,845 in 2024, double the state's $71,997. That year a single parent headed about one in nine families raising children, against nearly one in three statewide.

Sources
  • Williamson County was carved from neighboring Davidson County; Franklin is the county seat tennesseeencyclopedia.net
  • Williamson County is in the Nashville-Davidson--Murfreesboro--Franklin, TN metro area; its county seat is Franklin tnecd.com
  • County Health Rankings 2025 release: life expectancy is 81.5 years in Williamson County and 73.5 in Tennessee countyhealthrankings.org
  • The 2025 County Health Rankings release used 2020-2022 data for life expectancy (average number of years people are expected to live) countyhealthrankings.org
  • ACS 2024 1-year table B19013: median household income is $144,845 in Williamson County and $71,997 in Tennessee api.censusreporter.org
  • ACS 2024 1-year table B11003: in Williamson County 3,997 of 34,142 families with own children under 18 have a single householder with no spouse present (11.7%, about one in nine); in Tennessee 231,512 of 720,511 (32.1%, nearly one in three) api.censusreporter.org

v4 — beta, 30 October 2026, sourced values

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Eleven factors

Government behavior

  1. Fraser Institute state ranking (state)8.3
  2. 2A (state)10.0
  3. GOP + LP vote for President6.5
  4. Sales tax1.1
  5. Property tax8.2

Environment

  1. Air quality5.8
  2. Floods / hurricanes1.2

Private behavior

  1. Homicide rate8.7
  2. Life expectancy10.0
  3. Government employees8.1
  4. Single-parent households9.5

Neighbors