Addyston is a village in Miami Township, Hamilton County, Ohio, United States. Located along the Ohio River, it is a western suburb of the neighboring city of Cincinnati. The population was 927 at the 2020 census.

The village was named after Matthew Addy, the 1891 founder of the Addyston Pipe and Steel Company. On November 12, 2024, the Addyston village council voted 4-3 to disband the village's police department.

According to the United States Census Bureau, the village has a total area of 0.91 square miles (2.36 km), of which 0.85 square miles (2.20 km) is land and 0.06 square miles (0.16 km) is water.

Historical population

Census	Pop.	Note	%±
1890	1,182		—
1900	1,513		28.0%
1910	1,543		2.0%
1920	1,448		−6.2%
1930	1,708		18.0%
1940	1,610		−5.7%
1950	1,651		2.5%
1960	1,376		−16.7%
1970	1,336		−2.9%
1980	1,195		−10.6%
1990	1,198		0.3%
2000	1,010		−15.7%
2010	938		−7.1%
2020	927		−1.2%
2023 (est.)	904		−2.5%
U.S. Decennial Census

As of the census of 2020, there were 927 people living in the village, for a population density of 1,093.16 people per square mile (422.02/km). There were 440 housing units. The racial makeup of the village was 82.4% White, 6.7% Black or African American, 0.9% Native American, 0.2% Asian, 0.0% Pacific Islander, 1.2% from some other race, and 8.6% from two or more races. 2.3% of the population were Hispanic or Latino of any race.

There were 255 households, out of which 52.9% had children under the age of 18 living with them, 46.7% were married couples living together, 14.5% had a male householder with no spouse present, and 22.7% had a female householder with no spouse present. 20.8% of all households were made up of individuals, and 3.9% were someone living alone who was 65 years of age or older. The average household size was 3.10, and the average family size was 3.48.

36.2% of the village's population were under the age of 18, 53.2% were 18 to 64, and 10.6% were 65 years of age or older. The median age was 28.2. For every 100 females, there were 99.0 males.

According to the U.S. Census American Community Survey, for the period 2016-2020 the estimated median annual income for a household in the village was $63,313, and the median income for a family was $61,042. About 27.0% of the population were living below the poverty line, including 44.4% of those under age 18 and 0.0% of those age 65 or over. About 64.6% of the population were employed, and 8.6% had a bachelor's degree or higher.

As of the census of 2010, there were 938 people, 372 households, and 228 families living in the village. The population density was 1,103.5 inhabitants per square mile (426.1/km). There were 448 housing units at an average density of 527.1 per square mile (203.5/km). The racial makeup of the village was 89.7% White, 5.7% African American, 0.2% Native American, 0.2% Asian, 0.1% from other races, and 4.2% from two or more races. Hispanic or Latino of any race were 1.9% of the population.

There were 372 households, of which 33.6% had children under the age of 18 living with them, 33.6% were married couples living together, 20.7% had a female householder with no husband present, 7.0% had a male householder with no wife present, and 38.7% were non-families. 29.6% of all households were made up of individuals, and 10% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.15.

The median age in the village was 34.2 years. 25.3% of residents were under the age of 18; 11.5% were between the ages of 18 and 24; 27% were from 25 to 44; 26.1% were from 45 to 64; and 10.2% were 65 years of age or older. The gender makeup of the village was 50.5% male and 49.5% female.

As of the census of 2000, there were 1,010 people, 365 households, and 269 families living in the village. The population density was 1,165.1 inhabitants per square mile (449.8/km). There were 408 housing units at an average density of 470.7 per square mile (181.7/km). The racial makeup of the village was 87.82% White, 8.42% African American, 0.50% Native American, 0.40% Asian, 1.09% from other races, and 1.78% from two or more races. Hispanic or Latino of any race were 1.78% of the population.

There were 365 households, out of which 40.5% had children under the age of 18 living with them, 44.1% were married couples living together, 24.1% had a female householder with no husband present, and 26.3% were non-families. 24.1% of all households were made up of individuals, and 7.1% had someone living alone who was 65 years of age or older. The average household size was 2.77 and the average family size was 3.22.

In the village, the population was spread out, with 31.7% under the age of 18, 8.8% from 18 to 24, 31.4% from 25 to 44, 18.0% from 45 to 64, and 10.1% who were 65 years of age or older. The median age was 31 years. For every 100 females, there were 98.0 males. For every 100 females age 18 and over, there were 92.2 males.

The median income for a household in the village was $33,000, and the median income for a family was $34,808. Males had a median income of $29,583 versus $25,536 for females. The per capita income for the village was $13,266. About 9.2% of families and 11.6% of the population were below the poverty line, including 14.4% of those under age 18 and 14.8% of those age 65 or over.

• List of cities and towns along the Ohio River

• Village website