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County · code 21229

Washington CountyKentucky

Washington County is a county in Kentucky with its seat in Springfield. The county was formed on September 1, 1792.

  • Founded1792
  • County seatSpringfield
  • Named forGeorge Washington
  • Land area297 sq mi + 4.2 sq mi water
  • Population12,027 2020 Census
Open the free map Click any parcel in Washington County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MarionNelsonMercerAnderson Springfield Census outline · seat marked

Where it is

Washington on the map of Kentucky

Kentucky has 120 counties and county equivalents, each with its own records office. Shapes with a page are links.

Adair CountyAllen CountyAnderson CountyBallard CountyBarren CountyBath CountyBell CountyBoone CountyBourbon CountyBoyd CountyBoyle CountyBracken CountyBreathitt CountyBreckinridge CountyBullitt CountyButler CountyCaldwell CountyCalloway CountyCampbell CountyCarlisle CountyCarroll CountyCarter CountyCasey CountyChristian CountyClark CountyClay CountyClinton CountyCrittenden CountyCumberland CountyDaviess CountyEdmonson CountyElliott CountyEstill CountyFayette CountyFleming CountyFloyd CountyFranklin CountyFulton CountyGallatin CountyGarrard CountyGrant CountyGraves CountyGrayson CountyGreen CountyGreenup CountyHancock CountyHardin CountyHarlan CountyHarrison CountyHart CountyHenderson CountyHenry CountyHickman CountyHopkins CountyJackson CountyJefferson CountyJessamine CountyJohnson CountyKenton CountyKnott CountyKnox CountyLarue CountyLaurel CountyLawrence CountyLee CountyLeslie CountyLetcher CountyLewis CountyLincoln CountyLivingston CountyLogan CountyLyon CountyMcCracken CountyMcCreary CountyMcLean CountyMadison CountyMagoffin CountyMarion CountyMarshall CountyMartin CountyMason CountyMeade CountyMenifee CountyMercer CountyMetcalfe CountyMonroe CountyMontgomery CountyMorgan CountyMuhlenberg CountyNelson CountyNicholas CountyOhio CountyOldham CountyOwen CountyOwsley CountyPendleton CountyPerry CountyPike CountyPowell CountyPulaski CountyRobertson CountyRockcastle CountyRowan CountyRussell CountyScott CountyShelby CountySimpson CountySpencer CountyTaylor CountyTodd CountyTrigg CountyTrimble CountyUnion CountyWarren CountyWayne CountyWebster CountyWhitley CountyWolfe CountyWoodford CountyWashington County Washington
Counties of Kentucky · Washington highlighted

History

Formed in 1792 from Nelson County

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

Washington County was created from Nelson County on September 1, 1792, and named after George Washington. Over the following century, the county lost territory to the creation of Anderson County in 1827, Marion County in 1834 and 1845, and Mercer County in 1860, with a final loss of small areas to Anderson and Mercer counties in 1890.

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

  1. 1792
    Washington County created Washington created from Nelson.
    from Nelson
    · Ky. Acts 1792, 1st assy., 1st sess., ch. 2, sec. 1/p. 4
  2. 1827
    Lost territory Washington lost to creation of Anderson.
    to Anderson
    · Ky. Acts 1826-1827, 35th assy., ch. 35, sec. 1/pp. 44-47, and ch. 46, sec. 1/p. 55
  3. 1834
    Lost territory Washington lost to creation of Marion.
    to Marion
    · Ky. Acts 1833-1834, 42d assy., ch. 285, sec. 1/pp. 367-369
  4. 1845
    Lost territory Washington lost small area to Marion to accommodate local property owner.
    to Marion
    · Ky. Acts 1844-1845, ch. 172/p. 32
  5. 1890
    Lost territory Washington lost to Anderson and Mercer.
    to Andersonto Mercer
    · Ky. Acts 1889-1890, vol. 2, ch. 756, secs. 1-4, 7/pp. 508-510; vol. 3, ch. 1797, secs. 1-3/pp. 1471-1472
Show all 8 changes (3 more, mostly small adjustments)
  1. 1792
    Washington County created Washington created from Nelson.
    from Nelson
    · Ky. Acts 1792, 1st assy., 1st sess., ch. 2, sec. 1/p. 4
  2. 1827
    Lost territory Washington lost to creation of Anderson.
    to Anderson
    · Ky. Acts 1826-1827, 35th assy., ch. 35, sec. 1/pp. 44-47, and ch. 46, sec. 1/p. 55
  3. 1834
    Lost territory Washington lost to creation of Marion.
    to Marion
    · Ky. Acts 1833-1834, 42d assy., ch. 285, sec. 1/pp. 367-369
  4. 1837
    Boundary clarified Boundary between Washington and Marion was clarified (no change).
    with Marionno change
    · Ky. Acts 1836-1837, ch. 390/p. 261
  5. 1845
    Lost territory Washington lost small area to Marion to accommodate local property owner.
    to Marion
    · Ky. Acts 1844-1845, ch. 172/p. 32
  6. 1860
    Lost territory Washington lost small area to Mercer.
    to Mercer
    · Ky. Acts 1859-1860, vol. 2, ch. 660, sec. 1/p. 311
  7. 1869
    Lost territory Washington lost small area to Marion to accommodate local property owners.
    to Marion
    · Ky. Acts 1869, Jan. adj. sess., ch. 2103, sec. 1/p. 354
  8. 1890
    Lost territory Washington lost to Anderson and Mercer.
    to Andersonto Mercer
    · Ky. Acts 1889-1890, vol. 2, ch. 756, secs. 1-4, 7/pp. 508-510; vol. 3, ch. 1797, secs. 1-3/pp. 1471-1472

Land and parcels

What the maps cover in Washington

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

Washington by the Census

Population
12,027 2020 Census count
Housing units
5,196 2020 Census count
Land area
297 square miles
Water area
4.2 square miles
People per sq mi
40 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.

Zoning and code

  • Planning and zoning

    Contact Info for Building in Washington County

    from washingtoncountyky.com · checked 14 October 2026

County government

See your own lot on these maps

Open Washington County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about Washington County

When was Washington County founded?
Washington County was founded in 1792, formed from Nelson County, and named after George Washington.
What is the county seat of Washington County?
The county seat of Washington County is Springfield.
Is there an online parcel map for Washington County?
Not that we have found yet. Lot lines and owners of record are kept by the county assessor's office. When a public parcel map appears, it shows here.
Has Washington County's boundary or name changed?
Washington County was created in 1792 from Nelson County. Since then the Atlas of Historical County Boundaries records 6 later changes, chiefly involving Marion County, Anderson County and Mercer County.
Is my lot in a flood zone?
We do not have flood maps for Washington 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