County · code 48315
Marion CountyTexas
Marion County is a county in Texas with its seat in Jefferson, formed in 1860.
- Founded1860
- County seatJefferson
- Named forFrancis Marion
- Land area381 sq mi + 39 sq mi water
- Population9,725 2020 Census
- Parcels mapped19,753 checked 14 October 2026
Where it is
Marion 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 1860 from Cass County and Titus County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Marion County was created from Cass County and Titus County on February 8, 1860, and fully organized the following month. The county was named after Francis Marion. Marion gained small areas from Harrison County in 1863 and again in 1874.
- 1860Marion County created Marion created from Cass and Titus; Marion not fully organized. · Texas Laws 1859, 8th leg., reg. sess., gen., ch. 48/pp. 57-59
- 1860Changed Marion fully organized. · Kennedy, 132
- 1863Gained territory Marion gained small area from Harrison. · Texas Laws 1863, 10th leg., reg. sess., spec., ch. 9/p. 5
- 1874Gained territory Marion gained from Harrison. · Texas Laws 1874, 14th leg., reg. sess., ch. 127/p. 178
Land and parcels
What the maps cover in Marion
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 19,753 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 14 October 2026 -
Address points Official
One point per address, 8,705 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
Marion 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
Marion 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 Marion County.
See your own lot on these maps
Open Marion 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 Marion County
- When was Marion County founded?
- Marion County was founded in 1860, formed from Cass County and Titus County, and named after Francis Marion.
- What is the county seat of Marion County?
- The county seat of Marion County is Jefferson.
- Is there an online parcel map for Marion County?
- Yes. A public source publishes a parcel map of 19,753 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Marion County's boundary or name changed?
- Marion County was created in 1860 from Cass County and Titus County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Harrison County.
- Is my lot in a flood zone?
- We do not have flood maps for Marion County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby