County · code 48359
Oldham CountyTexas
Oldham County is a county in Texas, on the border with New Mexico, founded in 1876, with its seat at Vega.
- Founded1876
- County seatVega
- Named forWilliam Simpson Oldham Sr.
- Land area1,501 sq mi + 0.9 sq mi water
- Population1,758 2020 Census
- Parcels mapped4,210 checked 16 October 2026
Where it is
Oldham on the map of Texas
Texas has 254 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1876 from Jack County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Oldham County was created from Bexar Territory and Young Territory on November 19, 1876, and named after William Simpson Oldham Sr. Initially unorganized and attached to Jack County, Oldham was fully organized in 1881 and detached from Jack County. Over the following decades, Oldham County lost territory as neighboring counties were fully organized and detached, including Potter County in 1887, Deaf Smith County in 1890, and Hartley County in 1891.
- 1876Oldham County created Oldham created from Bexar Territory and Young Territory; Oldham not fully organized, attached to Jack "for judicial, surveying and all other purposes." Act passed 21 August 1876; took effect 19 November 1876. · Texas Laws 1876, 15th leg., ch. 144/pp. 236, 242
- 1879
- 1881Changed Castro, Dallam, Deaf Smith, Hartley, Moore, Parmer, Potter, Randall, Sherman, and Swisher detached from Wheeler, all attached to Oldham "for judicial purposes." · Texas Laws 1881, 17th leg., reg. sess., ch. 13, sec. 5/p. 8
- 1881
- 1931Oldham County created Western extent of Oldham explicitly extended to the Texas-New Mexico boundary (103d meridian) as established by John H. Clark in 1859. · Texas Laws 1931, 42d leg., reg. sess., ch. 358/p. 850
Show all 13 changes
- 1876Oldham County created Oldham created from Bexar Territory and Young Territory; Oldham not fully organized, attached to Jack "for judicial, surveying and all other purposes." Act passed 21 August 1876; took effect 19 November 1876. · Texas Laws 1876, 15th leg., ch. 144/pp. 236, 242
- 1879
- 1881Changed Castro, Dallam, Deaf Smith, Hartley, Moore, Parmer, Potter, Randall, Sherman, and Swisher detached from Wheeler, all attached to Oldham "for judicial purposes." · Texas Laws 1881, 17th leg., reg. sess., ch. 13, sec. 5/p. 8
- 1881
- 1883
- 1885
- 1887Changed Potter fully organized, detached from Oldham. · "Potter County," New Handbook of Texas, 5:300
- 1889
- 1890Changed Deaf Smith fully organized, detached from Oldham. · "Deaf Smith County," New Handbook of Texas, 2:546-547
- c. 1891
- 1891Changed Dallam detached from Oldham, attached to Hartley "for judicial purposes." Parmer detached from Oldham, attached to Deaf Smith "for judicial purposes." · Texas Laws 1891, 22d leg., reg. sess., ch. 46, sec. 2/p. 49
- 1891Changed Castro fully organized, detached from Oldham. · "Castro County," New Handbook of Texas, 1:1022
- 1931Oldham County created Western extent of Oldham explicitly extended to the Texas-New Mexico boundary (103d meridian) as established by John H. Clark in 1859. · Texas Laws 1931, 42d leg., reg. sess., ch. 358/p. 850
Land and parcels
What the maps cover in Oldham
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 4,210 parcels from Oldham County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 15 October 2026 · checked 16 October 2026 -
Address points Official
One point per address, 1,282 in all from Texas Geographic Information Office (TxGIO, formerly TNRIS), a division of the Texas Water Development Board; StratMap program.
checked 14 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- 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
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.
Records
County government
- County government
The official website of Oldham County.
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.
Questions
Common questions about Oldham County
- When was Oldham County founded?
- Oldham County was founded in 1876, formed from Jack County, and named after William Simpson Oldham Sr..
- What is the county seat of Oldham County?
- The county seat of Oldham County is Vega.
- Is there an online parcel map for Oldham County?
- Yes. Oldham County publishes a parcel map of 4,210 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 1876 from Jack County. Since then the Atlas of Historical County Boundaries records 12 later changes, chiefly involving Randall County, Deaf Smith County and Hartley 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