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County · code 28047

Harrison CountyMississippi

Harrison County is in Mississippi, with county seats in Biloxi and Gulfport. It was formed on May 3, 1841, from Hancock and Jackson counties and named after William Henry Harrison.

  • Founded1841
  • County seatBiloxi and Gulfport
  • Named forWilliam Henry Harrison
  • Land area574 sq mi + 411 sq mi water
  • Population208,621 2020 Census
  • Parcels mapped105,894 checked 16 October 2026
Open the free map Click any parcel in Harrison County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

StoneHancockJacksonSt. Bernard, LA Biloxi and Gulfport Census outline · seat marked

Where it is

Harrison 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 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 CountyUnion CountyWalthall CountyWarren CountyWashington CountyWayne CountyWebster CountyWilkinson CountyWinston CountyYalobusha CountyYazoo CountyHarrison County Harrison
Counties of Mississippi · Harrison highlighted

History

Formed in 1841 from Hancock County and Jackson County

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

Harrison County was created from Hancock County and Jackson County in 1841. The county gained territory from Jackson and Perry counties in 1844, lost territory to Jackson in 1846, and gained from Jackson again in 1875. In 1916, Harrison County lost territory with the creation of Stone County.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1841
    Harrison County created Harrison created from Hancock and Jackson.
    from Hancockfrom Jackson
    · Miss. Laws 1841, adj. sess., ch. 35, secs. 1-2, 7/pp. 145-147
  2. 1844
    Gained territory Harrison gained from Jackson and Perry.
    from Jacksonfrom Perry
    · Miss. Laws 1844, reg. sess., ch. 114/p. 302
  3. 1846
    Lost territory Harrison lost to Jackson.
    to Jackson
    · Miss. Laws 1846, reg. sess., ch. 241/p. 501
  4. 1875
    Gained territory Harrison gained from Jackson.
    from Jackson
    · Miss. Laws 1875, reg. sess., ch. 193/p. 237
  5. 1916
    Lost territory Harrison lost to creation of Stone.
    to Stone
    · Miss. Laws 1916, reg. sess., ch. 527, secs. 1, 3/pp. 593-594; Minutes of Stone Co. Board of Supervisors, 5 June 1916, p. 2
Show all 8 changes (3 more, mostly small adjustments)
  1. 1841
    Harrison County created Harrison created from Hancock and Jackson.
    from Hancockfrom Jackson
    · Miss. Laws 1841, adj. sess., ch. 35, secs. 1-2, 7/pp. 145-147
  2. 1842
    Boundary clarified Southern boundary of Harrison was clarified by extending jurisdiction from the shoreline to the state boundary in the Gulf of Mexico, including all islands within six leagues of the shore.
    no change
    · Miss. Laws 1842, reg. sess., ch. 52/pp. 174-176; U.S. Stat., vol. 3, ch. 23[1817], sec. 2/p. 348
  3. 1844
    Gained territory Harrison gained from Jackson and Perry.
    from Jacksonfrom Perry
    · Miss. Laws 1844, reg. sess., ch. 114/p. 302
  4. 1846
    Lost territory Harrison lost to Jackson.
    to Jackson
    · Miss. Laws 1846, reg. sess., ch. 241/p. 501
  5. 1872
    Boundary clarified Harrison boundaries with Hancock in St. Louis Bay, and with Jackson in Biloxi Bay were clarified (no change).
    with Hancockwith Jacksonno change
    · Miss. Laws 1872, reg. sess., ch. 27/p. 33
  6. 1875
    Gained territory Harrison gained from Jackson.
    from Jackson
    · Miss. Laws 1875, reg. sess., ch. 193/p. 237
  7. 1912
    Changed Legislature authorized creation of Stone from Harrison, Forrest, George, and Perry, dependent upon local referendum that failed (no change).
    StoneForrestGeorgePerry
    · HRS Miss., St. and Co., 112-113; Miss. Laws 1912, reg. sess., ch. 348, secs. 1, 3, 21/pp. 394-395, 402 and ch. 349, secs. 1, 3, 21/pp. 402-403, 409
  8. 1916
    Lost territory Harrison lost to creation of Stone.
    to Stone
    · Miss. Laws 1916, reg. sess., ch. 527, secs. 1, 3/pp. 593-594; Minutes of Stone Co. Board of Supervisors, 5 June 1916, p. 2

Land and parcels

What the maps cover in Harrison

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

Harrison by the Census

Population
208,621 2020 Census count
Housing units
91,554 2020 Census count
Land area
574 square miles
Water area
411 square miles · 42% of the county, including large bodies of water
People per sq mi
364 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

Harrison 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

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Questions

Common questions about Harrison County

When was Harrison County founded?
Harrison County was founded in 1841, formed from Hancock County and Jackson County, and named after William Henry Harrison.
What is the county seat of Harrison County?
The county seat of Harrison County is Biloxi and Gulfport.
Is there an online parcel map for Harrison County?
Yes. A public source publishes a parcel map of 105,894 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Harrison County's boundary or name changed?
Harrison County was created in 1841 from Hancock County and Jackson County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Jackson County, Perry County and Stone County.
Is my lot in a flood zone?
We do not have flood maps for Harrison 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