County · code 28127
Simpson CountyMississippi
Simpson County is a county in Mississippi with its county seat in Mendenhall. The county was created from Copiah County on January 23, 1824.
- Founded1824
- County seatMendenhall
- Land area589 sq mi + 1.3 sq mi water
- Population25,949 2020 Census
- Parcels mapped21,762 checked 16 October 2026
Where it is
Simpson on the map of Mississippi
Mississippi has 82 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1824 from Copiah County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Simpson County was created from Copiah County in 1824. In 1829, unceded Indian territory was attached jointly to Simpson and Rankin Counties, but this was separated the following year when the territory was divided between Covington, Jones, and Rankin Counties.
- 1824Simpson County created Simpson created from Copiah. · Miss. Laws 1823-1824, 7th sess., ch. 72, sec. 1/p. 87
- 1829Changed Non-County Area 5 (unceded Indian territory) was attached to Simpson and Rankin jointly. · Miss. Laws 1829, 12th sess., ch. 77, secs. 1-2/pp. 81-82
- 1830Lost territory Non-County Area 5 (attached to Rankin and Simpson) lost to creation of Non-County Areas 9 and 10. Non-County Area 9 was attached to Covington and Non-County Area 10 was attached to Jones. · Miss. Laws 1830, 13th sess., ch. 43/p. 46
- 1830Changed Non-County Area 5 was detached from Simpson and became part of Rankin. · Miss. Laws 1830, 13th sess., ch. 70/p. 89
Land and parcels
What the maps cover in Simpson
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 21,762 parcels from Simpson County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 27 August 2026 · checked 16 October 2026 -
Address points Missing
No public address points layer found for Simpson 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
Simpson 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 Simpson County.
See your own lot on these maps
Open Simpson 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 Simpson County
- When was Simpson County founded?
- Simpson County was founded in 1824, formed from Copiah County.
- What is the county seat of Simpson County?
- The county seat of Simpson County is Mendenhall.
- Is there an online parcel map for Simpson County?
- Yes. Simpson County publishes a parcel map of 21,762 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Simpson County's boundary or name changed?
- Simpson County was created in 1824 from Copiah County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Rankin County, Covington County and Jones County.
- Is my lot in a flood zone?
- We do not have flood maps for Simpson County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby