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County · code 21185

Oldham CountyKentucky

Oldham County is located in Kentucky and was formed in 1824, with its seat in La Grange.

  • Founded1824
  • County seatLa Grange
  • Named forWilliam Oldham
  • Land area187 sq mi + 9.1 sq mi water
  • Population67,607 2020 Census
  • Parcels mapped27,271 checked 15 October 2026
Open the free map Click any parcel in Oldham County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

TrimbleClark, INJeffersonShelbyHenry La Grange Census outline · seat marked

Where it is

Oldham on the map of Kentucky

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

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Counties of Kentucky · Oldham highlighted

History

Formed in 1824 from Henry County, Jefferson County and Shelby County

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

Oldham County was created in 1824 from Henry, Jefferson, and Shelby counties and was named after William Oldham. The county's boundaries shifted through the 19th century, losing territory to Shelby and Trimble counties and gaining small areas from Henry, Jefferson, and Shelby.

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

  1. 1824
    Oldham County created Oldham created from Henry, Jefferson, and Shelby.
    from Henryfrom Jeffersonfrom Shelby
    · Ky. Acts 1823-1824, 32d assy., ch. 602, sec. 1/pp. 328-329; Ky. Acts 1877-1878, vol. 1, ch. 281, sec. 1/p. 345
  2. 1833
    Lost territory Oldham lost to Shelby.
    to Shelby
    · Ky. Acts 1832-1833, 41st assy., ch. 74/p. 72
  3. 1837
    Lost territory Oldham lost to creation of Trimble.
    to Trimble
    · Ky. Acts 1836-1837, ch. 248, sec. 1/pp. 141-143, ch. 362, sec. 1/pp. 239-240, and ch. 369, sec. 6/pp. 249-250
  4. 1842
    Lost territory Oldham lost small area to Trimble.
    to Trimble
    · Ky. Acts 1841-1842, ch. 362, sec. 1/pp. 269-270
  5. 1874
    Gained territory Oldham gained from Jefferson.
    from Jefferson
    · Ky. Acts 1873-1874, ch. 42, sec. 1/p. 7
Show all 10 changes (5 more, mostly small adjustments)
  1. 1824
    Oldham County created Oldham created from Henry, Jefferson, and Shelby.
    from Henryfrom Jeffersonfrom Shelby
    · Ky. Acts 1823-1824, 32d assy., ch. 602, sec. 1/pp. 328-329; Ky. Acts 1877-1878, vol. 1, ch. 281, sec. 1/p. 345
  2. 1824
    Boundary clarified Boundary between Oldham and Henry was clarified (no change).
    with Henryno change
    · Ky. Acts 1824-1825, 33d assy., ch. 17/p. 19
  3. 1833
    Lost territory Oldham lost to Shelby.
    to Shelby
    · Ky. Acts 1832-1833, 41st assy., ch. 74/p. 72
  4. 1837
    Lost territory Oldham lost to creation of Trimble.
    to Trimble
    · Ky. Acts 1836-1837, ch. 248, sec. 1/pp. 141-143, ch. 362, sec. 1/pp. 239-240, and ch. 369, sec. 6/pp. 249-250
  5. 1842
    Lost territory Oldham lost small area to Trimble.
    to Trimble
    · Ky. Acts 1841-1842, ch. 362, sec. 1/pp. 269-270
  6. 1852
    Gained territory Oldham gained small area from Shelby.
    from Shelby
    · Ky. Acts 1851-1852, ch. 193/p. 510
  7. 1856
    Gained territory Oldham gained small area from Shelby to accommodate local property owners.
    from Shelby
    · Ky. Acts 1855-1856, vol. 1, ch. 273, sec. 1/p. 49
  8. 1874
    Gained territory Oldham gained small area from Henry.
    from Henry
    · Ky. Acts 1873-1874, ch. 28, sec. 1/p. 113
  9. 1874
    Gained territory Oldham gained from Jefferson.
    from Jefferson
    · Ky. Acts 1873-1874, ch. 42, sec. 1/p. 7
  10. 1878
    Boundary clarified Boundary between Oldham and Jefferson was clarified (no change).
    with Jeffersonno change
    · Ky. Acts 1877-1878, vol. 1, ch. 281, sec. 1/p. 345

Land and parcels

What the maps cover in Oldham

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

Oldham by the Census

Population
67,607 2020 Census count
Housing units
23,064 2020 Census count
Land area
187 square miles
Water area
9.1 square miles
People per sq mi
361 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

County government

See your own lot on these maps

Open Oldham 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 Oldham County

When was Oldham County founded?
Oldham County was founded in 1824, formed from Henry County, Jefferson County and Shelby County, and named after William Oldham.
What is the county seat of Oldham County?
The county seat of Oldham County is La Grange.
Is there an online parcel map for Oldham County?
Yes. A public source publishes a parcel map of 27,271 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Oldham County's boundary or name changed?
Oldham County was created in 1824 from Henry County, Jefferson County and Shelby County. Since then the Atlas of Historical County Boundaries records 7 later changes, most of them small boundary adjustments, chiefly involving Shelby County, Trimble County and Henry County.
Is my lot in a flood zone?
We do not have flood maps for Oldham 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