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County · code 28145

Union CountyMississippi

Union County is a county in Mississippi with its seat in New Albany. The county was formed on July 7, 1870.

  • Founded1870
  • County seatNew Albany
  • Land area416 sq mi + 1.3 sq mi water
  • Population27,777 2020 Census
  • Parcels mapped20,694 checked 15 October 2026
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Updated

PontotocTippahBentonLeeLafayettePrentissMarshall New Albany Census outline · seat marked

Where it is

Union on the map of Mississippi

Mississippi has 82 counties and county equivalents, each with its own records office. Shapes with a page are links.

Adams CountyAlcorn CountyAmite CountyAttala CountyBenton CountyBolivar CountyCalhoun CountyCarroll CountyChickasaw CountyChoctaw CountyClaiborne CountyClarke CountyClay CountyCoahoma CountyCopiah CountyCovington CountyDeSoto CountyForrest CountyFranklin CountyGeorge CountyGreene CountyGrenada CountyHancock CountyHarrison CountyHinds CountyHolmes CountyHumphreys CountyIssaquena CountyItawamba CountyJackson CountyJasper CountyJefferson CountyJefferson Davis CountyJones CountyKemper CountyLafayette CountyLamar CountyLauderdale CountyLawrence CountyLeake CountyLee CountyLeflore CountyLincoln CountyLowndes CountyMadison CountyMarion CountyMarshall CountyMonroe CountyMontgomery CountyNeshoba CountyNewton CountyNoxubee CountyOktibbeha CountyPanola CountyPearl River CountyPerry CountyPike CountyPontotoc CountyPrentiss CountyQuitman CountyRankin CountyScott CountySharkey CountySimpson CountySmith CountyStone CountySunflower CountyTallahatchie CountyTate CountyTippah CountyTishomingo CountyTunica CountyWalthall CountyWarren CountyWashington CountyWayne CountyWebster CountyWilkinson CountyWinston CountyYalobusha CountyYazoo CountyUnion County Union
Counties of Mississippi · Union highlighted

History

Formed in 1870 from Lee County, Pontotoc County and Tippah County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Union County was created from Lee, Pontotoc, and Tippah Counties. The county went through several boundary adjustments in its early years, gaining from and losing to neighboring counties Lee, Pontotoc, and Prentiss between 1873 and 1874.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1870
    Union County created Union created from Lee, Pontotoc, and Tippah.
    from Leefrom Pontotocfrom Tippah
    · Miss. Laws 1870, reg. sess., ch. 54, secs. 1, 9, 11/pp. 126, 128-129
  2. 1871
    Changed Redefinition of Union boundary with Pontotoc unintentionally implied a change that never took effect (no change).
    Pontotoc
    · Miss. Rev. Code 1871, ch. 2, art. 2, pars. 20-89/pp. 12-29
  3. 1872
    Boundary clarified Union boundary with Pontotoc was clarified, correcting mistake of 13 May 1871 (no change).
    with Pontotocno change
    · Miss. Laws 1872, reg. sess., ch. 39/p. 202
  4. 1873
    Gained territory Union gained from Pontotoc, lost to Lee.
    from Pontotocfrom Lee.
    · Miss. Laws 1873, reg. sess., ch. 209/p. 360
  5. 1874
    Gained territory Union gained from Lee, lost to Prentiss.
    from Leefrom Prentiss
    · Miss. Laws 1874, reg. sess., ch. 68/p. 136

Land and parcels

What the maps cover in Union

Who publishes each layer, how good it is, and when we last checked.

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

Union by the Census

Population
27,777 2020 Census count
Housing units
12,119 2020 Census count
Land area
416 square miles
Water area
1.3 square miles
People per sq mi
67 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Union County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

Open Union 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.

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Questions

Common questions about Union County

When was Union County founded?
Union County was founded in 1870, formed from Lee County, Pontotoc County and Tippah County.
What is the county seat of Union County?
The county seat of Union County is New Albany.
Is there an online parcel map for Union County?
Yes. Union County publishes a parcel map of 20,694 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Union County's boundary or name changed?
Union County was created in 1870 from Lee County, Pontotoc County and Tippah County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Lee County, Lee. County and Pontotoc County.
Is my lot in a flood zone?
We do not have flood maps for Union County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door