Airport

McKellar-Sipes Regional Airport (MKL) serves the county.^[7][8] Lake Graham, a large 500 acre reservoir primarily intended for recreation and wildlife habitat, is located in the county 5 miles east of Jackson.^[9]

Adjacent counties

• Gibson County (north)
• Carroll County (northeast)
• Henderson County (east)
• Chester County (southeast)
• Hardeman County (south)
• Haywood County (west)
• Crockett County (northwest)

State protected areas

• Pinson Mounds State Archaeological Park
• South Fork Waterfowl Refuge
• Lake Graham

Highways

• US-45
• US-412
• US-70
• I-40

2020 census

As of the 2020 United States census, there were 98,823 people, 38,930 households, and 25,748 families residing in the county.

2000 census

As of the census^[17] of 2000, there were 91,837 people, 35,552 households, and 24,637 families residing in the county. The population density was 165 people per square mile (64 people/km²). There were 38,205 housing units at an average density of 69 units per square mile (27/km²). There were 35,552 households, out of which 33.50% had children under the age of 18 living with them, 49.80% were married couples living together, 15.90% had a female householder with no husband present, and 30.70% were non-families. 26.20% of all households were made up of individuals, and 9.30% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.00.

The racial makeup of the county was 65.20% non-Hispanic White or European American, 32.46% non-Hispanic Black or African American, 0.16% Native American, 0.63% Asian, 0.01% Pacific Islander, 0.67% from other races, and 0.86% from two or more races. 1.71% of the population were Hispanic or Latino of any race.

There were 35,552 households, out of which 33.50% had children under the age of 18 living with them, 49.80% were married couples living together, 15.90% had a female householder with no husband present, and 30.70% were non-families. 26.20% of all households were made up of individuals, and 9.30% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.00.

In the county, the population was spread out, with 25.80% under the age of 18, 11.00% from 18 to 24, 29.10% from 25 to 44, 21.70% from 45 to 64, and 12.30% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 92.10 males. For every 100 females age 18 and over, there were 87.20 males.

The median income for a household in the county was $36,982, and the median income for a family was $44,595. Males had a median income of $34,253 versus $23,729 for females. The per capita income for the county was $19,389. About 10.80% of families and 14.00% of the population were below the poverty line, including 18.40% of those under age 18 and 11.80% of those age 65 or over.

Cities

• Humboldt (mostly in Gibson County, Tennessee)
• Jackson (county seat and largest city)
• Medon (partially in Hardeman County, Tennessee)
• Three Way

Census-Designated Places

• Mercer (partly in Haywood County, Tennessee)

Unincorporated communities