Adjacent counties

• Hickman County, Kentucky (northwest)
• Graves County, Kentucky (north)
• Henry County (east)
• Carroll County (southeast)
• Gibson County (southwest)
• Obion County (west)

State protected areas

• Bean Switch Refuge
• Big Cypress Tree State Natural Area
• Big Cypress Tree State Park
• Harts Mill Wetland Wildlife Management Area (part)
• Obion River Wildlife Management Area (part)

2020 census

As of the 2020 United States census, there were 32,902 people, 13,640 households, and 8,677 families residing in the county.

2000 census

As of the census^[13] of 2000, there were 34,895 people, 13,599 households, and 9,124 families residing in the county. The population density was 60 people per square mile (23 people/km²). There were 14,928 housing units at an average density of 26 units per square mile (10/km²). The racial makeup of the county was 90.27% White, 6.95% Black or African American, 0.15% Native American, 1.32% Asian, 0.01% Pacific Islander, 0.52% from other races, and 0.78% from two or more races. 1.15% of the population were Hispanic or Latino of any race.

There were 13,599 households, out of which 29.40% had children under the age of 18 living with them, 54.20% were married couples living together, 9.50% had a female householder with no husband present, and 32.90% were non-families. 27.00% of all households were made up of individuals, and 11.50% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.89.

The population was spread out, with 21.60% under the age of 18, 15.90% from 18 to 24, 26.10% from 25 to 44, 21.90% from 45 to 64, and 14.50% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 94.20 males. For every 100 females age 18 and over, there were 91.10 males.

The median income for a household in the county was $30,008, and the median income for a family was $38,658. Males had a median income of $28,597 versus $20,845 for females. The per capita income for the county was $15,408. About 11.10% of families and 16.00% of the population were below the poverty line, including 16.80% of those under age 18 and 16.20% of those age 65 or over.

Radio

• WWGY 99.3 "Today's Best Music with "Ace & TJ in the Morning"
• WRQR-FM 105.5 "Today's Best Music with "Ace & TJ in the Morning"
• WENK-AM 1240 "The Greatest Hits of All Time"
• WTPR-AM 710 "The Greatest Hits of All Time"
• WTPR-FM 101.7 "The Greatest Hits of All Time"
• WCMT-AM 1410 100.5FM
• WCMT-FM 101.3
• WUTM-FM 90.3
• (WCDZ FM 95.1 and 102.9FM)
• WCMT-AM 1410 "your best friend"

Print

• Dresden Enterprise - located in Dresden, the county seat.^[14]
• The Weakley County Press - located in Martin
• The Pacer - Student newspaper of the University of Tennessee at Martin

Weakley County Schools

School District website - http://www.weakleyschools.com/

Cities

• Greenfield
• Martin
• McKenzie (mostly in Carroll County and a small portion in Henry County)

Towns

• Dresden (county seat)
• Gleason
• Sharon

Unincorporated communities

• Austin Springs
• Boydsville
• Dukedom (partial)
• Gardner
• Latham
• Palmersville