County · code 48119
Delta CountyTexas
Delta County is a county in Texas with its seat in Cooper. The county was formed on July 29, 1870.
- Founded1870
- County seatCooper
- Land area257 sq mi + 21 sq mi water
- Population5,230 2020 Census
- Parcels mapped6,437 checked 15 October 2026
Where it is
Delta 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 1870 from Hopkins County and Lamar County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Delta County was created on July 29, 1870, from parts of Hopkins County and Lamar County, though it was not fully organized at that time. The county became fully organized on October 6, 1870, and gained additional territory from Hopkins County on March 31, 1871. On November 17, 1871, Delta County lost territory to Lamar County.
- 1870Delta County created Delta created from Hopkins and Lamar; Delta not fully organized. · Texas Laws 1870, 12th leg., called sess., ch. 30/p. 42
- 1870Changed Delta fully organized. · "Delta County," New Handbook of Texas, 2:580
- 1871Gained territory Delta gained from Hopkins. · Texas Laws 1871, 12th leg., 1st sess., ch. 25/p. 18
- 1871
Land and parcels
What the maps cover in Delta
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 6,437 parcels from Delta County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 3 February 2026 · checked 15 October 2026 -
Address points Official
One point per address, 4,019 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
Delta 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
Delta County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Delta County.
See your own lot on these maps
Open Delta 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 Delta County
- When was Delta County founded?
- Delta County was founded in 1870, formed from Hopkins County and Lamar County.
- What is the county seat of Delta County?
- The county seat of Delta County is Cooper.
- Is there an online parcel map for Delta County?
- Yes. Delta County publishes a parcel map of 6,437 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Delta County's boundary or name changed?
- Delta County was created in 1870 from Hopkins County and Lamar County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Hopkins County and Lamar County.
- Is my lot in a flood zone?
- We do not have flood maps for Delta County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby