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County · code 21003

Allen CountyKentucky

Allen County is a county in Kentucky with its county seat in Scottsville. The county was created on April 1, 1815, from parts of Barren and Warren counties and named after John Allen.

  • Founded1815
  • County seatScottsville
  • Named forJohn Allen
  • Land area344 sq mi + 7.5 sq mi water
  • Population20,588 2020 Census
Open the free map Click any parcel in Allen County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

Macon, TNBarrenWarrenSumner, TNSimpsonMonroe Scottsville Census outline · seat marked

Where it is

Allen 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 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 CountyWashington CountyWayne CountyWebster CountyWhitley CountyWolfe CountyWoodford CountyAllen County Allen
Counties of Kentucky · Allen highlighted

History

Formed in 1815 from Barren County and Warren County

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

Allen County was created in 1815 from Barren and Warren counties. The county's boundaries shifted multiple times in the 19th century, with gains and losses involving Warren, Simpson, Monroe, and Barren counties.

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

  1. 1815
    Allen County created Allen created from Barren and Warren.
    from Barrenfrom Warren
    · Ky. Acts 1814-1815, 23d assy., ch. 188, sec. 1/pp. 262-264
  2. 1816
    Lost territory Allen lost to Warren.
    to Warren
    · Ky. Acts 1815-1816, 24th assy., ch. 332, sec. 1/p. 545
  3. 1819
    Gained territory Allen gained from Warren, lost to creation of Simpson.
    from Warrenfrom Simpson
    · Ky. Acts 1818-1819, 27th assy., ch. 342, sec. 1/pp. 633-637
  4. 1820
    Lost territory Allen lost to Simpson.
    to Simpson
    · Ky. Acts 1820, 29th assy., ch. 90, sec. 1/pp. 110-111
  5. 1822
    Gained territory Allen gained from Simpson.
    from Simpson
    · Ky. Acts 1822, 31st assy., ch. 380, sec. 1/p. 51
Show all 10 changes (5 more)
  1. 1815
    Allen County created Allen created from Barren and Warren.
    from Barrenfrom Warren
    · Ky. Acts 1814-1815, 23d assy., ch. 188, sec. 1/pp. 262-264
  2. 1816
    Lost territory Allen lost to Warren.
    to Warren
    · Ky. Acts 1815-1816, 24th assy., ch. 332, sec. 1/p. 545
  3. 1819
    Gained territory Allen gained from Warren, lost to creation of Simpson.
    from Warrenfrom Simpson
    · Ky. Acts 1818-1819, 27th assy., ch. 342, sec. 1/pp. 633-637
  4. 1820
    Lost territory Allen lost to Simpson.
    to Simpson
    · Ky. Acts 1820, 29th assy., ch. 90, sec. 1/pp. 110-111
  5. 1822
    Gained territory Allen gained from Simpson.
    from Simpson
    · Ky. Acts 1822, 31st assy., ch. 380, sec. 1/p. 51
  6. 1825
    Gained territory Allen gained from Monroe.
    from Monroe
    · Ky. Acts 1824-1825, 33d assy., ch. 127, sec. 1/pp. 131-132
  7. 1825
    Gained territory Allen gained from Barren.
    from Barren
    · Ky. Acts 1825, 34th assy., ch. 111, sec. 1/pp. 112-113
  8. 1828
    Gained territory Allen gained from Warren.
    from Warren
    · Ky. Acts 1827-1828, 36th assy., ch. 85/p. 92
  9. 1861
    Gained territory Allen gained from Barren.
    from Barren
    · Ky. Acts 1861, Nov. adj. sess., ch. 236, sec. 1/pp. 30-31
  10. 1888
    Lost territory Allen lost small area to Barren to accommodate local property owner.
    to Barren
    · Ky. Acts 1887-1888, vol. 1, ch. 306, sec. 1/p. 650

Land and parcels

What the maps cover in Allen

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

Allen by the Census

Population
20,588 2020 Census count
Housing units
9,208 2020 Census count
Land area
344 square miles
Water area
7.5 square miles
People per sq mi
60 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.

Permits

County government

See your own lot on these maps

Open Allen 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 Allen County

When was Allen County founded?
Allen County was founded in 1815, formed from Barren County and Warren County, and named after John Allen.
What is the county seat of Allen County?
The county seat of Allen County is Scottsville.
Is there an online parcel map for Allen 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 Allen County's boundary or name changed?
Allen County was created in 1815 from Barren County and Warren County. Since then the Atlas of Historical County Boundaries records 9 later changes, chiefly involving Barren County, Simpson County and Warren County.
Who issues building permits in Allen County?
The county's page on building permits: Allen County, KY Mobile Home Permit. Inside a city or town, ask that city first.
Is my lot in a flood zone?
We do not have flood maps for Allen 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