See C. G. Heilbrun, The Garnett Family (1961).
According to the United States Census Bureau, the city has a total area of 3.1 square miles (8.0 km²), of which, 3.0 square miles (7.7 km²) of it is land and 0.1 square miles (0.2 km²) of it (2.92%) is water.
As of the census of 2000, there were 3,368 people, 1,439 households, and 886 families residing in the city. The population density was 1,124.6 people per square mile (434.9/km²). There were 1,597 housing units at an average density of 533.2/sq mi (206.2/km²). The racial makeup of the city was 96.97% White, 0.39% African American, 1.04% Native American, 0.27% Asian, 0.06% Pacific Islander, 0.53% from other races, and 0.74% from two or more races. Hispanic or Latino of any race were 1.45% of the population.
There were 1,439 households out of which 28.8% had children under the age of 18 living with them, 50.2% were married couples living together, 8.5% had a female householder with no husband present, and 38.4% were non-families. 34.7% of all households were made up of individuals and 21.1% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 2.91.
In the city the population was spread out with 24.4% under the age of 18, 7.5% from 18 to 24, 23.3% from 25 to 44, 20.7% from 45 to 64, and 24.1% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 88.2 males. For every 100 females age 18 and over, there were 82.1 males.
The median income for a household in the city was $31,518, and the median income for a family was $38,095. Males had a median income of $31,175 versus $19,858 for females. The per capita income for the city was $16,265. About 9.2% of families and 13.0% of the population were below the poverty line, including 18.6% of those under age 18 and 9.9% of those age 65 or over.