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County · code 47187

Williamson CountyTennessee

Williamson County is a county in Tennessee with its seat in Franklin. It was created on October 26, 1799, from Davidson County and named after Hugh Williamson.

  • Founded1799
  • County seatFranklin
  • Named forHugh Williamson
  • Land area583 sq mi + 1.2 sq mi water
  • Population247,726 2020 Census
  • Parcels mapped107,578 checked 15 October 2026
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Updated

DavidsonMauryCheathamMarshallRutherfordDicksonHickman Franklin Census outline · seat marked

Where it is

Williamson on the map of Tennessee

Tennessee has 95 counties and county equivalents, each with its own records office. Shapes with a page are links.

Anderson CountyBedford CountyBenton CountyBledsoe CountyBlount CountyBradley CountyCampbell CountyCannon CountyCarroll CountyCarter CountyCheatham CountyChester CountyClaiborne CountyClay CountyCocke CountyCoffee CountyCrockett CountyCumberland CountyDavidson CountyDecatur CountyDeKalb CountyDickson CountyDyer CountyFayette CountyFentress CountyFranklin CountyGibson CountyGiles CountyGrainger CountyGreene CountyGrundy CountyHamblen CountyHamilton CountyHancock CountyHardeman CountyHardin CountyHawkins CountyHaywood CountyHenderson CountyHenry CountyHickman CountyHouston CountyHumphreys CountyJackson CountyJefferson CountyJohnson CountyKnox CountyLake CountyLauderdale CountyLawrence CountyLewis CountyLincoln CountyLoudon CountyMcMinn CountyMcNairy CountyMacon CountyMadison CountyMarion CountyMarshall CountyMaury CountyMeigs CountyMonroe CountyMontgomery CountyMoore CountyMorgan CountyObion CountyOverton CountyPerry CountyPickett CountyPolk CountyPutnam CountyRhea CountyRoane CountyRobertson CountyRutherford CountyScott CountySequatchie CountySevier CountyShelby CountySmith CountyStewart CountySullivan CountySumner CountyTipton CountyTrousdale CountyUnicoi CountyUnion CountyVan Buren CountyWarren CountyWashington CountyWayne CountyWeakley CountyWhite CountyWilson CountyWilliamson County Williamson
Counties of Tennessee · Williamson highlighted

History

Formed in 1799 from Davidson County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Williamson County was created from Davidson County on October 26, 1799. Over the following decades, the county lost territory to the creation of Rutherford, Bedford, and Maury counties through 1807.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1799
    Williamson County created Williamson created from Davidson.
    from Davidson
    · Tenn. Acts 1799, 3d assy., ch. 3, sec. 1/p. 182
  2. 1801
    Gained territory Williamson gained from Non-County Area 2. · Tenn. Acts 1801, 4th assy., ch. 37/p. 270
  3. 1803
    Lost territory Williamson lost to creation of Rutherford.
    to Rutherford
    · Tenn. Acts 1803, 5th assy., 1st sess., ch. 70/p. 119
  4. 1807
    Lost territory Williamson lost to creation of Bedford; act anticipated the creation of Maury effective 15 December 1807.
    to Bedfordto Maury
    · Tenn. Acts 1807, 7th assy., 1st sess., ch. 37, sec. 1/p. 71
  5. 1807
    Lost territory Williamson lost to creation of Maury; that part of Williamson south of Maury reverted to Non-County Area 7 attached to Maury for administrative and judicial purposes.
    to Maury
    · Tenn. Acts 1807, 7th assy., 1st sess., ch. 94, secs. 1-2, 13, 16/pp. 149-153
Show all 47 changes (42 more, mostly small adjustments)
  1. 1799
    Williamson County created Williamson created from Davidson.
    from Davidson
    · Tenn. Acts 1799, 3d assy., ch. 3, sec. 1/p. 182
  2. 1801
    Gained territory Williamson gained from Non-County Area 2. · Tenn. Acts 1801, 4th assy., ch. 37/p. 270
  3. 1803
    Lost territory Williamson lost to creation of Rutherford.
    to Rutherford
    · Tenn. Acts 1803, 5th assy., 1st sess., ch. 70/p. 119
  4. 1807
    Lost territory Williamson lost to creation of Bedford; act anticipated the creation of Maury effective 15 December 1807.
    to Bedfordto Maury
    · Tenn. Acts 1807, 7th assy., 1st sess., ch. 37, sec. 1/p. 71
  5. 1807
    Lost territory Williamson lost to creation of Maury; that part of Williamson south of Maury reverted to Non-County Area 7 attached to Maury for administrative and judicial purposes.
    to Maury
    · Tenn. Acts 1807, 7th assy., 1st sess., ch. 94, secs. 1-2, 13, 16/pp. 149-153
  6. 1809
    Lost territory Williamson lost to Bedford.
    to Bedford
    · Scott, ch. 37/p. 1141
  7. 1815
    Changed Legislature authorized Williamson to gain from Davidson, dependent on local referendum.
    Davidson
    · Tenn. Acts 1815, 11th assy., ch. 153/p. 192
  8. 1844
    Lost territory Williamson lost to Rutherford.
    to Rutherford
    · Tenn. Acts 1843, 25th assy., ch. 34/p. 35
  9. 1852
    Lost territory Williamson lost small area to Rutherford.
    to Rutherford
    · Tenn. Acts 1851, 29th assy., ch. 304/p. 588
  10. 1854
    Gained territory Williamson gained from Rutherford to accommodate local residents.
    from Rutherford
    · Tenn. Acts 1853, 30th assy., ch. 94/p. 174
  11. 1860
    Gained territory Williamson gained from Marshall to accommodate local resident.
    from Marshall
    · Tenn. Acts 1859, 33d assy., 1st sess., priv., ch. 100, secs. 1-14/pp. 368-370
  12. 1867
    Lost territory Williamson lost to Rutherford.
    to Rutherford
    · Tenn. Acts 1867, 35th assy., 1st sess., pub., ch. 13, secs. 1-7/pp. 9-11
  13. 1869
    Gained territory Williamson gained from Rutherford to accommodate local resident.
    from Rutherford
    · Tenn. Acts 1868, 35th assy., 2d sess., pub., ch. 20/p. 20
  14. 1870
    Gained territory Williamson gained from Cheatham.
    from Cheatham
    · Tenn. Acts 1869, 36th assy., 1st sess., pub., ch. 88/p. 105
  15. 1871
    Gained territory Williamson gained from Rutherford to accommodate local residents; Williamson lost to Rutherford to accommodate local residents.
    from Rutherford
    · Tenn. Acts 1871, 37th assy., 1st sess., ch. 135/p. 157; ch. 148/p. 174
  16. 1877
    Gained territory Williamson gained from Marshall and Rutherford to accommodate local residents. Williamson lost small area to Rutherford.
    from Marshallfrom Rutherford
    · Tenn. Acts 1877, 40th assy., 1st sess., ch. 165/p. 188; ch. 156/p. 181; ch. 168/p. 190
  17. 1879
    Gained territory Williamson gained from Rutherford to accommodate local resident.
    from Rutherford
    · Tenn. Acts 1879, 41st assy., 1st sess., ch. 137, secs. 1-17/pp. 174-177
  18. 1881
    Lost territory Williamson lost to Maury to accommodate local residents.
    to Maury
    · Tenn. Acts 1881, 42d assy., 1st sess., ch. 107/p. 137
  19. 1887
    Gained territory Williamson gained from Marshall and Maury to accommodate local residents.
    from Marshallfrom Maury
    · Tenn. Acts 1887, 45th assy., ch. 48/p. 119
  20. 1887
    Lost territory Williamson lost to Maury to accommodate local resident.
    to Maury
    · Tenn. Acts 1887, 45th assy., ch. 42/p. 115
  21. 1889
    Lost territory Williamson lost small area to Davidson.
    to Davidson
    · Tenn. Acts 1889, 46th assy., 1st sess., ch. 75/p. 110
  22. 1889
    Gained territory Williamson gained from Hickman to accommodate local resident; Williamson gained from Marshall to accommodate local resident.
    from Hickmanfrom Marshallfrom Williamson-Marshall
    · Tenn. Acts 1889, 46th assy., 1st sess., ch. 133/p. 271; ch. 129/p. 246
  23. 1891
    Lost territory Williamson lost to Rutherford to accommodate local resident.
    to Rutherford
    · Tenn. Acts 1891, 47th assy., ch. 19/p. 48
  24. 1893
    Exchanged territory Williamson exchanged with Rutherford to accommodate local residents.
    with Rutherford
    · Tenn. Acts 1893, 48th assy., ch. 5/p. 6
  25. 1893
    Gained territory Williamson gained from Maury to accommodate local residents.
    from Maury
    · Tenn. Acts 1893, 48th assy., ch. 27/p. 35
  26. 1895
    Lost territory Williamson lost to Davidson to accommodate local residents (later repealed).
    to Davidson
    · Tenn. Acts 1895, 49th assy., ch. 28/p. 39
  27. 1897
    Lost territory Williamson lost to Rutherford to accommodate local residents.
    to Rutherford
    · Tenn. Acts 1897, 50th assy., ch. 225/p. 532
  28. 1897
    Gained territory Williamson gained from Maury to accommodate local residents.
    from Maury
    · Tenn. Acts 1897, 50th assy., ch. 259/p. 574
  29. 1897
    Lost territory Williamson lost to Davidson to accommodate local residents.
    to Davidson
    · Tenn. Acts 1897, 50th assy., ch. 279/p. 603
  30. 1897
    Lost territory Williamson lost to Davidson to accommodate local resident.
    to Davidson
    · Tenn. Acts 1897, 50th assy., ch. 227/p. 534
  31. 1899
    Gained territory Williamson gained from Davidson to accommodate local residents (later repealed).
    from Davidson
    · Tenn. Acts 1899, 51st assy., ch. 220/p. 473
  32. 1901
    Exchanged territory Williamson exchanged with Rutherford to accommodate local residents.
    with Rutherford
    · Tenn. Acts 1901, 52d assy., ch. 349/p. 798
  33. 1905
    Lost territory Williamson lost to Maury to accommodate local residents.
    to Maury
    · Tenn. Acts 1905, 54th assy., ch. 205/p. 429
  34. 1905
    Gained territory Williamson gained from Dickson to accommodate local resident.
    from Dickson
    · Tenn. Acts 1905, 54th assy., ch. 525/p. 1185
  35. 1909
    Lost territory Williamson lost to Rutherford to accommodate local resident.
    to Rutherford
    · Tenn. Acts 1909, 56th assy., ch. 46/p. 130
  36. 1909
    Exchanged territory Williamson exchanged with Dickson to accommodate local residents.
    with Dickson
    · Tenn. Acts 1909, 56th assy., ch. 558/p. 1990
  37. 1911
    Gained territory Williamson gained from Maury to accommodate local resident.
    from Maury
    · Tenn. Acts 1911, 57th assy., priv., ch. 109/p. 257
  38. 1921
    Gained territory Williamson gained from Dickson to accommodate local resident.
    from Dickson
    · Tenn. Acts 1921, 62d assy., priv., ch. 643/p. 2026
  39. 1923
    Gained territory Williamson gained from Maury to accommodate local residents.
    from Maury
    · Tenn. Acts 1923, 63d assy., priv., ch. 452/p. 1741; ch. 453/p. 1742
  40. 1929
    Lost territory Williamson lost to Rutherford to accommodate local resident.
    to Rutherford
    · Tenn. Acts 1929, 66th assy., priv., ch. 346/p. 892
  41. 1929
    Gained territory Williamson gained from Rutherford to accommodate local resident.
    from Rutherford
    · Tenn. Acts 1929, 66th assy., priv., ch. 650/p. 1828
  42. 1931
    Exchanged territory Williamson exchanged small areas with Davidson.
    with Davidsonwith Williamson-Davidson
    · Tenn. Acts 1931, 67th assy., priv., ch. 793/p. 2092
  43. 1933
    Gained territory Williamson gained from Rutherford to accommodate local residents.
    from Rutherford
    · Tenn. Acts 1933, 68th assy., priv., ch. 430/p. 1021
  44. 1935
    Gained territory Williamson gained from Rutherford to accommodate local resident.
    from Rutherford
    · Tenn. Acts 1935, 69th assy., priv., ch. 649/p. 1741
  45. 1935
    Gained territory Williamson gained from Maury to accommodate local residents.
    from Mauryfrom Williamson-Maury
    · Tenn. Acts 1935, 69th assy., priv., ch. 691/p. 1845
  46. 1939
    Lost territory Williamson lost to Rutherford to accommodate local residents.
    to Rutherford
    · Tenn. Acts 1939, 71st assy., priv., ch. 518/p. 1665
  47. 1945
    Lost territory Williamson lost to Rutherford to accommodate local resident.
    to Rutherfordto Williamson-Rutherford
    · Tenn. Acts 1945, 74th assy., priv., ch. 434/p. 1352

Land and parcels

What the maps cover in Williamson

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Williamson by the Census

Population
247,726 2020 Census count
Housing units
91,133 2020 Census count
Land area
583 square miles
Water area
1.2 square miles
People per sq mi
425 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Records

Zoning and code

County government

See your own lot on these maps

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Questions

Common questions about Williamson County

When was Williamson County founded?
Williamson County was founded in 1799, formed from Davidson County, and named after Hugh Williamson.
What is the county seat of Williamson County?
The county seat of Williamson County is Franklin.
Is there an online parcel map for Williamson County?
Yes. A public source publishes a parcel map of 107,578 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Williamson County's boundary or name changed?
Williamson County was created in 1799 from Davidson County. Since then the Atlas of Historical County Boundaries records 46 later changes, most of them small boundary adjustments, chiefly involving Rutherford County, Maury County and Davidson County.
Is my lot in a flood zone?
We do not have flood maps for Williamson County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door