County · code 48193
Hamilton CountyTexas
Hamilton County is a county in Texas with its county seat in Hamilton. The county was formed on January 22, 1858.
- Founded1858
- County seatHamilton
- Named forJames Hamilton
- Land area836 sq mi + 0.5 sq mi water
- Population8,222 2020 Census
- Parcels mapped14,031 checked 14 October 2026
Where it is
Hamilton 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 1858 from Bosque County and Lampasas County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Hamilton County was created from Bosque and Lampasas counties, though it was not fully organized until August 2, 1858. The county was named after James Hamilton. In 1887, Hamilton County lost territory to the creation of Mills County.
- 1858Hamilton County created Hamilton created from Bosque, Lampasas, and all of Non-County Area 24; Hamilton not fully organized. · Texas Laws 1857, 7th leg., ch. 55, sec. 9/pp. 60-61 and ch. 56/p. 63
- 1858Changed Hamilton fully organized. · Kennedy, 102
- 1887Lost territory Hamilton lost to creation of Mills. · Texas Laws 1887, 20th leg., reg. sess., ch. 37/p. 25
Land and parcels
What the maps cover in Hamilton
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 14,031 parcels from Hamilton County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 14 October 2026 · checked 14 October 2026 -
Address points Official
One point per address, 4,187 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
Hamilton 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 Hamilton County.
See your own lot on these maps
Open Hamilton 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 Hamilton County
- When was Hamilton County founded?
- Hamilton County was founded in 1858, formed from Bosque County and Lampasas County, and named after James Hamilton.
- What is the county seat of Hamilton County?
- The county seat of Hamilton County is Hamilton.
- Is there an online parcel map for Hamilton County?
- Yes. Hamilton County publishes a parcel map of 14,031 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Hamilton County's boundary or name changed?
- Hamilton County was created in 1858 from Bosque County and Lampasas County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Mills County.
- Is my lot in a flood zone?
- We do not have flood maps for Hamilton County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby