| Official Name: | Knoxville, Arkansas |
| Settlement Type: | City |
| Mapsize: | 250px |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name: | United States |
| Subdivision Name1: | Arkansas |
| Subdivision Name2: | Johnson |
| Leader Title: | Mayor |
| Leader Name: | John Tyson |
| Area Total Km2: | 8.27 |
| Area Total Sq Mi: | 3.19 |
| Area Land Km2: | 8.25 |
| Area Land Sq Mi: | 3.18 |
| Area Water Km2: | 0.02 |
| Area Water Sq Mi: | 0.01 |
| Elevation Ft: | 387 |
| Population As Of: | 2020 |
| Population Total: | 660 |
| Population Density Km2: | 80.02 |
| Population Density Sq Mi: | 207.29 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Coordinates: | 35.3781°N -93.3631°W |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP code |
| Postal Code: | 72845 |
| Area Code: | 479 |
| Blank Name: | FIPS code |
| Blank Info: | 05-37300 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2405959 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
Knoxville is a city[2] in Johnson County, Arkansas, United States.[3] The population was 731 at the 2010 census.
According to the United States Census Bureau, the city has a total area of 2.2sqmi, all land.
As of the census[4] of 2000, there were 511 people, 194 households, and 138 families residing in the city. The population density was 230.3sp=usNaNsp=us. There were 210 housing units at an average density of 94.7sp=usNaNsp=us. The racial makeup of the city was 95.89% White, 1.57% Native American, 0.20% Asian, 1.37% from other races, and 0.98% from two or more races. 4.11% of the population were Hispanic or Latino of any race.
There were 194 households, out of which 34.5% had children under the age of 18 living with them, 59.8% were married couples living together, 8.8% had a female householder with no husband present, and 28.4% were non-families. 22.2% of all households were made up of individuals, and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 3.13.
In the city the population was spread out, with 27.8% under the age of 18, 9.0% from 18 to 24, 29.2% from 25 to 44, 20.7% from 45 to 64, and 13.3% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 110.3 males. For every 100 females age 18 and over, there were 95.2 males.
The median income for a household in the city was $31,250, and the median income for a family was $34,375. Males had a median income of $22,031 versus $22,857 for females. The per capita income for the city was $15,404. About 9.2% of families and 12.6% of the population were below the poverty line, including 13.5% of those under age 18 and 18.3% of those age 65 or over.