Major highways

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

Adjacent counties

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

National protected area

• Shiloh National Military Park (part)

2020 census

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

2000 census

As of the census^[12] 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/km²). There were 15,818 housing units at an average density of 40 units per square mile (15 units/km²). 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.

City

• Corinth (county seat and largest municipality)

Towns

• Farmington
• Glen
• Rienzi

Village

• Kossuth

Census-designated places

• Biggersville
• Jacinto

Unincorporated places

• Hinkle
• Kendrick
• Theo
• Wenasoga

Ghost towns

• Boneyard
• Danville