County · code 29059
Dallas CountyMissouri
Dallas County is a county in Missouri with its seat at Buffalo, formed in 1841.
- Founded1841
- County seatBuffalo
- Named forGeorge M. Dallas
- Land area541 sq mi + 1.9 sq mi water
- Population17,071 2020 Census
- Parcels mapped13,423 checked 16 October 2026
Where it is
Dallas on the map of Missouri
Missouri has 115 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1841
An old deed may name a county that no longer exists, or a boundary that has since moved.
Dallas County was created on January 29, 1841, from Non-County Area 32 as Niangua County. The county was renamed Dallas in 1844. It was named after George M. Dallas. In 1855, the county lost territory to Webster County.
- 1841Dallas County created Niangua (now Dallas) created from Non-County Area 32; Non-County Area 32 eliminated. · Mo. Laws 1840-1841, pub., sec. 16/p. 34
- 1844Renamed Niangua renamed Dallas.formerly Niangua· Mo. Laws 1844-1845, loc. and priv., pp. 25-26
- 1855Lost territory Dallas lost to Webster. · Mo. Laws 1855, adj. sess., loc. and priv., pp. 40-42
Land and parcels
What the maps cover in Dallas
Who publishes each layer, how good it is, and when we last checked.
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Parcels Fallback
Lot lines and tax-map numbers for 13,423 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey. This copy is a fallback, not the county's own: use it as a guide and check the official record.
checked 16 October 2026 -
Address points Missing
No public address points layer found for Dallas County yet.
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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
Dallas 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
Dallas 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 Dallas County.
See your own lot on these maps
Open Dallas 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 Dallas County
- When was Dallas County founded?
- Dallas County was founded in 1841, and named after George M. Dallas.
- What is the county seat of Dallas County?
- The county seat of Dallas County is Buffalo.
- Is there an online parcel map for Dallas County?
- Yes. A public source publishes a parcel map of 13,423 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Dallas County's boundary or name changed?
- Dallas County was created in 1841. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Niangua County and Webster County. It was formerly called Niangua.
- Is my lot in a flood zone?
- We do not have flood maps for Dallas County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby