History
In 1820, a portion of Casey County, now south of KY Route 300, was annexed to Mercer County. This became part of Boyle County when Boyle County was formed on February 15, 1842, from sections of Lincoln County and Mercer County. It is named for John Boyle, Congressman, Chief Justice of the Kentucky Court of Appeals, and U.S. District Judge.
Associate Justice of the Supreme Court of the United States John Marshall Harlan, a supporter of civil rights and the sole dissenter in the Civil Rights Cases and Plessy v. Ferguson, was born in Boyle County in 1833.
A courthouse fire in 1860 resulted in the loss of some county records. [4]
During the American Civil War, the Battle of Perryville took place here on October 8, 1862, fought between the Confederate Army of Mississippi and the Union Army of the Ohio. 7407 men fell in the battle.
Demographics
Historical population| Census | Pop. | Note | %± |
|---|
| 1850 | 9,116 | | — |
|---|
| 1860 | 9,304 | | 2.1% |
|---|
| 1870 | 9,515 | | 2.3% |
|---|
| 1880 | 11,930 | | 25.4% |
|---|
| 1890 | 12,948 | | 8.5% |
|---|
| 1900 | 13,817 | | 6.7% |
|---|
| 1910 | 14,668 | | 6.2% |
|---|
| 1920 | 14,998 | | 2.2% |
|---|
| 1930 | 16,282 | | 8.6% |
|---|
| 1940 | 17,075 | | 4.9% |
|---|
| 1950 | 20,532 | | 20.2% |
|---|
| 1960 | 21,257 | | 3.5% |
|---|
| 1970 | 21,090 | | −0.8% |
|---|
| 1980 | 25,066 | | 18.9% |
|---|
| 1990 | 25,641 | | 2.3% |
|---|
| 2000 | 27,697 | | 8.0% |
|---|
| 2010 | 28,432 | | 2.7% |
|---|
| 2020 | 30,614 | | 7.7% |
|---|
| 2024 (est.) | 31,394 | [6] | 2.5% |
|---|
|
As of the census [11] of 2000, there were 27,697 people, 10,574 households, and 7,348 families residing in the county. The population density was 152 per square mile (59/km2). There were 11,418 housing units at an average density of 63 per square mile (24/km2). The racial makeup of the county was 87.77% White, 9.68% Black or African American, 0.19% Native American, 0.56% Asian, 0.03% Pacific Islander, 0.65% from other races, and 1.12% from two or more races. Hispanic or Latino of any race were 1.44% of the population.
There were 10,574 households, of which 31.00% had children under the age of 18 living with them, 53.70% were married couples living together, 12.50% had a female householder with no husband present, and 30.50% were non-families. 27.10% of all households were made up of individuals, and 12.10% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.87.
By age, 22.70% of the population was under 18, 11.00% from 18 to 24, 28.60% from 25 to 44, 23.70% from 45 to 64, and 14.10% were 65 or older. The median age was 37 years. For every 100 females, there were 98.30 males. For every 100 females age 18 and over, there were 96.00 males.
The median income for a household in the county was US $35,241, and the median income for a family was $42,699. Males had a median income of $33,411 versus $23,635 for females. The per capita income for the county was $18,288. About 9.10% of families and 11.90% of the population were below the poverty line, including 15.80% of those under age 18 and 12.10% of those age 65 or over.
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United States
Kentucky 
