Major highways

• U.S. Highway 82
• Highway 29
• Highway 53
• Highway 160

Adjacent counties

• Hempstead County (north)
• Nevada County (northeast)
• Columbia County (east)
• Webster Parish, Louisiana (southeast)
• Bossier Parish, Louisiana (south)
• Caddo Parish, Louisiana (southwest)
• Miller County (west)

2020 census

As of the 2020 United States census, there were 6,308 people, 2,784 households, and 1,801 families residing in the county.

2000 census

As of the 2000 United States Census,^[13] there were 8,559 people, 3,434 households, and 2,376 families residing in the county. The population density was 16 people per square mile (6.2 people/km²). There were 4,560 housing units at an average density of 9 per square mile (3.5/km²). The racial makeup of the county was 62.08% White, 36.49% Black or African American, 0.37% Native American, 0.22% Asian, 0.01% Pacific Islander, 0.20% from other races, and 0.63% from two or more races. 1.03% of the population were Hispanic or Latino of any race.

There were 3,434 households, out of which 27.90% had children under the age of 18 living with them, 50.60% were married couples living together, 14.40% had a female householder with no husband present, and 30.80% were non-families. 28.40% of all households were made up of individuals, and 14.60% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 3.00.

In the county, the population was spread out, with 25.40% under the age of 18, 8.10% from 18 to 24, 24.40% from 25 to 44, 24.40% from 45 to 64, and 17.70% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 93.60 males. For every 100 females age 18 and over, there were 87.80 males.

The median income for a household in the county was $24,831, and the median income for a family was $30,720. Males had a median income of $26,492 versus $17,000 for females. The per capita income for the county was $14,128. About 18.70% of families and 23.20% of the population were below the poverty line, including 31.50% of those under age 18 and 19.30% of those age 65 or over.

Towns

• Bradley
• Buckner
• Lewisville (county seat)
• Stamps

Townships

Townships in Arkansas are the divisions of a county. Each township includes unincorporated areas; some may have incorporated cities or towns within part of their boundaries. Arkansas townships have limited purposes in modern times. However, the United States census does list Arkansas population based on townships (sometimes referred to as "county subdivisions" or "minor civil divisions"). Townships are also of value for historical purposes in terms of genealogical research. Each town or city is within one or more townships in an Arkansas county based on census maps and publications. The townships of Lafayette County are listed below; listed in parentheses are the cities, towns, and/or census-designated places that are fully or partially inside the township. ^[15][16]

• Baker (most of Stamps)
• French
• Hadley (Buckner, small part of Stamps)
• La Grange (small part of Lewisville)
• Mars Hill
• Roane (Bradley)
• Russell
• Steel (most of Lewisville)
• Walker Creek

Source:^[17]