It was the home of Ohio Governor Othneil Looker.
Harrison's mayor is Joel McGuire, an attorney and former Army Ranger. On November 6, 2007, McGuire (Independent) defeated incumbent mayor Daniel Gieringer (Democrat) by a vote of 58.7% to 41.3%. McGuire is a native of Harrison, Ohio and a former member of the city council.
It has a council made up of 7 members (Deborah Acra, Tony Burkart, Judy Kercheval, Matt Hiatt, William Neyer, Jim Robertson and Randy Shank) who are elected to 4 year terms.
Its police department is an accredited department with 21 sworn officers and 4 civilian personnel. It is headed by Col. Charles Linsey, Chief of Police.
The Fire Department is headed by Chief Rob Hursong. The Harrison Fire Department is a combination department with thirty-three employees, sixteen of which are full-time and seventeen part-time. The Harrison Fire Department coverage areas consist of 44 square miles in Ohio and Indiana resulting in 2100 Fire and EMS details annually.
According to the United States Census Bureau, the city has a total area of 3.7 square miles (9.7 km²), of which, 3.7 square miles (9.6 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.80%) is water.
There were 2,717 households out of which 41.4% had children under the age of 18 living with them, 57.6% were married couples living together, 11.7% had a female householder with no husband present, and 26.2% were non-families. 22.3% of all households were made up of individuals and 8.6% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.26.
In the city the population was spread out with 29.9% under the age of 18, 9.9% from 18 to 24, 31.4% from 25 to 44, 19.4% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 93.7 males. For every 100 females age 18 and over, there were 91.3 males.
The median income for a household in the city was $46,107, and the median income for a family was $54,028. Males had a median income of $37,455 versus $27,418 for females. The per capita income for the city was $17,966. About 4.3% of families and 6.8% of the population were below the poverty line, including 5.6% of those under age 18 and 5.0% of those age 65 or over.