Major highways

Adjacent counties

• White County (north)
• Prairie County (east)
• Arkansas County (southeast)
• Jefferson County (south)
• Pulaski County (west)
• Faulkner County (northwest)

2020 census

As of the 2020 United States census, there were 74,015 people, 26,052 households, and 18,824 families residing in the county.

2000 census

As of the 2000 census,^[13] there were 52,828 people, 19,262 households, and 15,024 families residing in the county. The population density was 69 inhabitants per square mile (27/km²). There were 20,749 housing units at an average density of 27 per square mile (10/km²). The racial makeup of the county was 91.03% White, 6.44% Black or African American, 0.49% Native American, 0.42% Asian, 0.03% Pacific Islander, 0.51% from other races, and 1.08% from two or more races. 1.75% of the population were Hispanic or Latino of any race.

There were 19,262 households, out of which 40.30% had children under the age of 18 living with them, 63.30% were married couples living together, 10.60% had a female householder with no husband present, and 22.00% were non-families. 19.00% of all households were made up of individuals, and 7.60% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.09.

In the county, the population was spread out, with 28.70% under the age of 18, 8.00% from 18 to 24, 30.90% from 25 to 44, 21.90% from 45 to 64, and 10.40% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 96.80 males. For every 100 females age 18 and over, there were 93.50 males.

The median income for a household in the county was $40,314, and the median income for a family was $46,173. Males had a median income of $32,451 versus $22,897 for females. The per capita income for the county was $17,397. About 8.10% of families and 10.50% of the population were below the poverty line, including 12.20% of those under age 18 and 13.60% of those age 65 or over.

Politics

Over the past few election cycles, Lonoke County has trended heavily towards the Republican party. The last Democrat (as of 2020) to carry the county was Bill Clinton in 1996.

Cities

• Austin
• Cabot
• Carlisle
• England
• Humnoke
• Lonoke (county seat)
• Ward

Towns

• Allport
• Coy
• Keo

Census-designated place

• Scott

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 Lonoke 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]