Demographics
Historical population| Census | Pop. | Note | %± |
|---|
| 1860 | 9,518 | | — |
|---|
| 1870 | 10,561 | | 11.0% |
|---|
| 1880 | 13,492 | | 27.8% |
|---|
| 1900 | 16,512 | | — |
|---|
| 1910 | 17,726 | | 7.4% |
|---|
| 1920 | 16,823 | | −5.1% |
|---|
| 1930 | 18,080 | | 7.5% |
|---|
| 1940 | 20,893 | | 15.6% |
|---|
| 1950 | 18,369 | | −12.1% |
|---|
| 1960 | 15,941 | | −13.2% |
|---|
| 1970 | 14,623 | | −8.3% |
|---|
| 1980 | 15,664 | | 7.1% |
|---|
| 1990 | 14,908 | | −4.8% |
|---|
| 2000 | 15,069 | | 1.1% |
|---|
| 2010 | 14,962 | | −0.7% |
|---|
| 2020 | 13,266 | | −11.3% |
|---|
| 2023 (est.) | 12,685 | [5] | −4.4% |
|---|
|
2020 census
As of the 2020 United States Census, there were 13,266 people, 5,846 households, and 3,752 families residing in the county.
2000 census
As of the census [12] of 2000, there were 15,069 people, 6,019 households, and 4,255 families residing in the county. The population density was 26 people per square mile (10 people/km2). There were 6,902 housing units at an average density of 12 per square mile (4.6/km2). The racial makeup of the county was 69.41% White or Caucasian, 28.65% Black or African American, 0.13% Native American, 0.06% Asian, 0.03% Pacific Islander, 1.11% from other races, and 0.59% from two or more races. 2.11% of the population were Hispanic or Latino of any race.
According to the census [12] of 2000, the largest ancestry groups in Calhoun County were English 64.4%, African 29% and Scots-Irish 4.5%
There were 6,019 households, out of which 31.60% had children under the age of 18 living with them, 51.00% were married couples living together, 15.40% had a female householder with no husband present, and 29.30% were non-families. 27.10% of all households were made up of individuals, and 13.90% 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 2.97.
In the county, the population was spread out, with 25.20% under the age of 18, 8.40% from 18 to 24, 27.00% from 25 to 44, 22.70% from 45 to 64, and 16.70% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 90.70 males. For every 100 females age 18 and over, there were 87.00 males.
The median income for a household in the county was $27,113, and the median income for a family was $34,407. Males had a median income of $26,458 versus $19,491 for females. The per capita income for the county was $15,106. About 14.90% of families and 18.10% of the population were below the poverty line, including 24.20% of those under age 18 and 21.80% of those age 65 or over.
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Derma is a town in Calhoun County, Mississippi, United States. The population was 1,025 at the 2010 census.
Slate Springs is a village in Calhoun County, Mississippi, United States. The population was 110 at the 2010 census.
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Big Creek is a village in Calhoun County, Mississippi, United States. The population was 154 at the 2010 census.
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United States
Mississippi 
