|Founded||May 1, 1803|
|Named for||Richard Montgomery|
|• Total||464 sq mi (1,200 km2)|
|• Land||462 sq mi (1,200 km2)|
|• Water||2.8 sq mi (7 km2) 0.6%%|
| • Estimate |
|• Density||1,200/sq mi (450/km2)|
|Time zone||UTC−5 (Eastern)|
|• Summer (DST)||UTC−4 (EDT)|
Montgomery County is located in the southwestern portion of the U.S. state of Ohio. As of the 2020 census, the population was 537,309,making it the fifth-most populous county in Ohio. The county seat is Dayton. The county was named in honor of Richard Montgomery, an American Revolutionary War general killed in 1775 while attempting to capture Quebec City, Canada. Montgomery County is part of the Dayton, Ohio Metropolitan Statistical Area.
According to the United States Census Bureau, the county has a total area of 464 square miles (1,200 km2), of which 462 square miles (1,200 km2) is land and 2.8 square miles (7.3 km2) (0.6%) is water.
|U.S. Decennial Census |
As of the census of 2000, there were 559,062 people, 229,229 households, and 146,935 families living in the county. The population density was 1,211 people per square mile (468/km2). There were 248,443 housing units at an average density of 538 per square mile (208/km2). The racial makeup of the county was 76.57% White, 19.86% Black or African American, 0.23% Native American, 1.31% Asian, 0.04% Pacific Islander, 0.49% from other races, and 1.51% from two or more races. 1.27% of the population were Hispanic or Latino of any race.
There were 229,229 households, out of which 29.60% had children under the age of 18 living with them, 46.30% were married couples living together, 13.80% had a female householder with no husband present, and 35.90% were non-families. 30.40% of all households were made up of individuals, and 10.10% had someone living alone who was 65 years of age or older. The average household size was 2.37, and the average family size was 2.96.
In the county, the population was spread out, with 24.70% under the age of 18, 9.70% from 18 to 24, 29.00% from 25 to 44, 22.90% from 45 to 64, and 13.70% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 92.30 males. For every 100 females age 18 and over, there were 88.60 males.
The median income for a household in the county was $40,156, and the median income for a family was $50,071. Males had a median income of $38,710 versus $27,297 for females. The per capita income for the county was $21,743. About 8.30% of families and 11.30% of the population were below the poverty line, including 15.60% of those under age 18 and 8.20% of those age 65 or over.
As of the 2010 census, there were 535,153 people, 223,943 households, and 138,060 families living in the county. 1,159.5 inhabitants per square mile (447.7/km2). There were 254,775 housing units at an average density of 552.0 per square mile (213.1/km2). The racial makeup of the county was 73.9% white, 20.9% black or African American, 1.7% Asian, 0.2% American Indian, 0.8% from other races, and 2.4% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 24.9% were German, 12.8% were Irish, 9.7% were American, and 8.8% were English.The population density was
Of the 223,943 households, 29.7% had children under the age of 18 living with them, 41.6% were married couples living together, 15.3% had a female householder with no husband present, 38.4% were non-families, and 32.2% of all households were made up of individuals. The average household size was 2.33, and the average family size was 2.94. The median age was 39.2 years.
The median income for a household in the county was $43,965, and the median income for a family was $56,559. Males had a median income of $45,680 versus $34,991 for females. The per capita income for the county was $24,828. About 11.7% of families and 15.7% of the population were below the poverty line, including 22.7% of those under age 18 and 8.7% of those aged 65 or over.
In the six presidential elections until 2016, Montgomery County has voted for the Democratic candidate, but not by large margins. However, in 2016, Republican Donald Trump narrowly defeated Democrat Hillary Clinton. Montgomery County was also the most populated county in Ohio to go for Trump in 2016, and it was the only county in Ohio to flip for Joe Biden in 2020.
The following public school districts are located partially or entirely in Montgomery County:
There is also a public independent (not a part of any school district) STEM school:
The following private high schools are located in Montgomery County:
Dayton is the sixth-largest city in the state of Ohio and the county seat of Montgomery County. A small part of the city extends into Greene County. The 2020 U.S. census estimate put the city population at 137,644, while Greater Dayton was estimated to be at 814,049 residents. The Combined Statistical Area (CSA) was 1,086,512. This makes Dayton the fourth-largest metropolitan area in Ohio and 73rd in the United States. Dayton is within Ohio's Miami Valley region, 50 miles (80 km) north of the Greater Cincinnati area.
Warren County is a county located in the southwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 242,337. Its county seat is Lebanon. The county is one of Ohio’s most affluent, with the county median income the highest of Ohio’s 88 counties. The county was created on May 1, 1803 from Hamilton County; it is named for Dr. Joseph Warren, a hero of the Revolution who sent Paul Revere and the overlooked William Dawes on their famous rides and who died at the Battle of Bunker Hill. Warren County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.
Miami County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 108,774. Its county seat is Troy. The county is named in honor of the Miami people.
Greene County is located in the southwestern portion of the U.S. state of Ohio. As of the 2020 census, the population was 167,966. Its county seat is Xenia. The county was established on March 24, 1803 and named for General Nathanael Greene, an officer in the Revolutionary War. Greene County is part of the Dayton, OH Metropolitan Statistical Area.
Brookville is a small city in northwestern Montgomery County, Ohio, United States. It is a suburb of Dayton. The population was 5,884 at the 2010 census, an increase from 5,289 in 2000. It is part of the Dayton Metropolitan Statistical Area.
Centerville is a city in Montgomery County, Ohio, United States. A core suburb of Metro Dayton, its population was 24,240 as of the 2020 census.
Clayton is a city in Montgomery county in the U.S. state of Ohio. The population was 13,310 at the 2020 United States census. A suburb of Dayton. It is part of the Dayton Metropolitan Statistical Area.
Englewood is a city in Montgomery County, Ohio, and a northern suburb of Dayton. The population was 13,465 at the time of the 2010 census. It is part of the Dayton metropolitan area.
Miamisburg is a city in Montgomery County, Ohio. The population was 20,181 at the time of the 2010 census. A suburb of Dayton. It is part of the Dayton metropolitan area. Miamisburg is known for its large industry and retail factors commercial business area, which is partially located in Miami Township, and as the home to the Miamisburg Mound. Miamisburg borders Miami Township, Springboro, and West Carrollton. The sister city of Miamisburg is Owen Sound, Ontario, Canada.
Northridge is an unincorporated community in Harrison Township in Montgomery County, Ohio, United States. It was delineated as a census-designated place (CDP) for the 2000 census, at which time its population was 8,487. It was not delineated as a CDP for the 2010 census. It is located directly north of the city of Dayton and is part of the Dayton Metropolitan Statistical Area.
Oakwood is a city in Montgomery County, Ohio, United States. A suburb of Dayton. The population was 9,202 at the 2010 census. Oakwood is part of the Dayton metropolitan area. It was incorporated in 1908. John Henry Patterson, industrialist and founder of the National Cash Register Corporation, is considered the "Father of Oakwood."
Phillipsburg is a village in Montgomery County, Ohio, United States. The population was 557 at the 2010 census. It is part of the Dayton Metropolitan Statistical Area.
Trotwood is a city in Montgomery County, Ohio, United States and is a suburb of Dayton.
West Carrollton is a city in Montgomery County, Ohio, United States. The population was 13,143 at the 2010 census. It is part of the Dayton Metropolitan Statistical Area. The Great Miami River runs through the town and forms most of its northern border.
Kettering is a city in Montgomery county in the U.S. state of Ohio. Almost entirely in Montgomery County, it is an inner suburb of Dayton, Ohio. As of the 2020 census, the city had a population of 57,862, making it the largest suburb in Dayton metropolitan area.
Union is a city in Montgomery and Miami Counties in the U.S. state of Ohio. The population was 6,419 at the time of the 2010 census. It is part of the Dayton Metropolitan Statistical Area.
Springboro is a city in the U.S. state of Ohio. A suburb of Cincinnati and Dayton, it is located mostly in Warren County in Clearcreek and Franklin Townships; with a small portion in Miami Township in Montgomery County. The city is part of the Miami Valley. As of the 2010 census, the city had a population of 17,409, which had grown to an estimated 18,931 in 2019.
Dayton Metro Library is a multi-branch library system serving 531,687 residents of the Dayton Metropolitan Area. It has 19 locations across the area. Almost 5.8 million items were borrowed in 2018. The Dayton Metro Library ranks in the top ten best libraries in the United States serving a population of over 250,000 by HAPLR. The Dayton Metro Library system is considered a county system with branches in cities and towns throughout Montgomery County, Ohio, but does not have branches in Centerville, Germantown, Oakwood, Riverside or Washington Township. All are serviced by libraries of their own, save Riverside, various parts of which are geographically close to Dayton Metro Library locations, including Burkhardt, Electra C. Doren and Huber Heights.
The Dayton, OH Metropolitan Statistical Area, also known as Greater Dayton and the Miami Valley, as defined by the United States Census Bureau, is an area consisting of three counties in the Miami Valley region of Ohio and is anchored by the city of Dayton. As of 2020, it is the fourth largest metropolitan area in Ohio and the 73rd largest metropolitan area by population in the United States with a population of 814,049.
The Southwestern Buckeye League (SWBL) is an Ohio High School Athletic Association (OHSAA) sports conference made up of schools located in southwestern Ohio, mainly around the greater Dayton and Cincinnati areas. It was established in 1944.