Alcorn County is a county located in the northeastern portion of the U.S. state of Mississippi. As of the 2020 census, the population was 34,740. Its county seat is Corinth. The county is named in honor of Governor James L. Alcorn.

The Corinth Micropolitan Statistical Area includes all of Alcorn County.

Alcorn County was formed on April 15, 1870, from portions of Tippah and Tishomingo counties. It was the site of the Siege of Corinth, an early campaign in the American Civil War.

According to the U.S. Census Bureau, the county has a total area of 401 square miles (1,040 km), of which 400 square miles (1,000 km) is land and 1.3 square miles (3.4 km) (0.3%) is water. It is the smallest county by area in Mississippi. The Tuscumbia and Hatchie rivers intersect the county.

• U.S. Route 45
• U.S. Route 72
• Mississippi Highway 2

• McNairy County, Tennessee (north)
• Hardin County, Tennessee (northeast)
• Tishomingo County (east)
• Prentiss County (south)
• Tippah County (west)
• Hardeman County, Tennessee (northwest)

• Shiloh National Military Park (part)

Historical population

Census	Pop.	Note	%±
1870	10,431		—
1880	14,272		36.8%
1890	13,115		−8.1%
1900	14,987		14.3%
1910	18,159		21.2%
1920	21,369		17.7%
1930	23,653		10.7%
1940	26,969		14.0%
1950	27,158		0.7%
1960	25,282		−6.9%
1970	27,179		7.5%
1980	33,036		21.5%
1990	31,722		−4.0%
2000	34,558		8.9%
2010	37,057		7.2%
2020	34,740		−6.3%
2023 (est.)	34,135		−1.7%
U.S. Decennial Census 1790-1960 1900-1990 1990-2000 2010-2013

Alcorn County Racial Composition

Race	Num.	Perc.
White	27,738	79.84%
Black or African American	4,316	12.42%
Native American	61	0.18%
Asian	180	0.52%
Pacific Islander	19	0.05%
Other/Mixed	1,178	3.39%
Hispanic or Latino	1,248	3.59%

As of the 2020 United States Census, there were 34,740 people, 14,649 households, and 9,590 families residing in the county.

As of the census of 2000, there were 34,558 people, 14,224 households, and 9,914 families residing in the county. The population density was 86 people per square mile (33 people/km). There were 15,818 housing units at an average density of 40 units per square mile (15 units/km). The racial makeup of the county was 87.37% White, 11.07% Black or African American, 0.10% Native American, 0.21% Asian, 0.06% Pacific Islander, 0.59% from other races, and 0.60% from two or more races. 1.28% of the population were Hispanic or Latino of any race.

There were 14,224 households, out of which 30.90% had children under the age of 18 living with them, 54.50% were married couples living together, 11.50% had a female householder with no husband present, and 30.30% were non-families. 27.60% of all households were made up of individuals, and 11.90% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.91.

In the county, the population was spread out, with 23.90% under the age of 18, 9.10% from 18 to 24, 27.90% from 25 to 44, 24.40% from 45 to 64, and 14.80% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 93.90 males. For every 100 females age 18 and over, there were 89.60 males.

The median income for a household in the county was $29,041, and the median income for a family was $36,899. Males had a median income of $29,752 versus $20,583 for females. The per capita income for the county was $15,418. About 13.10% of families and 16.60% of the population were below the poverty line, including 18.60% of those under age 18 and 22.60% of those age 65 or over.

United States presidential election results for Alcorn County, Mississippi

Year	Republican		Democratic		Third party(ies)
	No.	%	No.	%	No.	%
2020	12,818	81.16%	2,782	17.62%	193	1.22%
2016	11,819	79.95%	2,684	18.16%	280	1.89%
2012	11,111	74.92%	3,511	23.67%	208	1.40%
2008	10,805	71.17%	4,130	27.20%	247	1.63%
2004	8,634	60.64%	5,454	38.30%	151	1.06%
2000	7,254	57.40%	5,059	40.03%	325	2.57%
1996	4,960	45.25%	4,964	45.28%	1,038	9.47%
1992	6,249	44.21%	6,373	45.08%	1,514	10.71%
1988	6,641	54.88%	5,335	44.08%	126	1.04%
1984	7,203	58.66%	4,862	39.60%	214	1.74%
1980	5,196	41.25%	6,242	49.56%	1,157	9.19%
1976	3,430	31.85%	6,995	64.95%	345	3.20%
1972	5,732	83.28%	982	14.27%	169	2.46%
1968	1,760	19.16%	1,122	12.21%	6,304	68.63%
1964	3,377	63.79%	1,917	36.21%	0	0.00%
1960	820	18.32%	3,054	68.25%	601	13.43%
1956	827	20.31%	3,143	77.19%	102	2.50%
1952	1,155	26.07%	3,275	73.93%	0	0.00%
1948	91	2.94%	1,013	32.77%	1,987	64.28%
1944	206	7.17%	2,669	92.83%	0	0.00%
1940	133	4.34%	2,934	95.63%	1	0.03%
1936	53	2.16%	2,396	97.52%	8	0.33%
1932	73	2.87%	2,461	96.74%	10	0.39%
1928	335	17.95%	1,531	82.05%	0	0.00%
1924	223	10.86%	1,828	89.04%	2	0.10%
1920	354	20.45%	1,336	77.18%	41	2.37%
1916	125	7.87%	1,452	91.38%	12	0.76%
1912	40	3.59%	1,010	90.75%	63	5.66%

Lester Carpenter, member of the Mississippi House of Representatives representing the First District of Mississippi, which includes part of Alcorn and Tishomingo counties. Nick Bain represents the 2nd House District which is exclusively in Alcorn County.

• Corinth (county seat and largest municipality)

• Farmington
• Glen
• Rienzi

• Kossuth

• Biggersville
• Jacinto

• Hinkle
• Kendrick
• Theo
• Wenasoga

• Boneyard
• Danville

The vast majority of the county is in the Alcorn School District, but some portions, including all of the city of Corinth, are in the Corinth School District.

Northeast Mississippi Community College is the community college for Alcorn County.

• Dry counties
• National Register of Historic Places listings in Alcorn County, Mississippi

Government

• Official website

General information

• Geographic data related to Alcorn County, Mississippi at OpenStreetMap
• Alcorn County, Mississippi at Ballotpedia
• Alcorn County, Mississippi at MSGenWeb
• Works by or about Alcorn County, Mississippi at the Internet Archive