As of the census of 2010, there were 18,795 people, 7,507 households, and 5,124 families residing in the city. The population density was 1,364.9 inhabitants per square mile (527.0/km2). There were 7,898 housing units at an average density of 573.6 per square mile (221.5/km2). The racial makeup of the city was 78.5% White, 13.4% African American, 0.1% Native American, 5.7% Asian, 0.3% from other races, and 1.9% from two or more races. Hispanic or Latino of any race were 1.2% of the population.
There were 7,507 households of which 35.5% had children under the age of 18 living with them, 56.9% were married couples living together, 8.9% had a female householder with no husband present, 2.5% had a male householder with no wife present, and 31.7% were non-families. 27.8% of all households were made up of individuals and 12.1% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.09.
The median age in the city was 41.4 years. 25.4% of residents were under the age of 18; 5.7% were between the ages of 18 and 24; 24.8% were from 25 to 44; 29.4% were from 45 to 64; and 14.5% were 65 years of age or older. The gender makeup of the city was 46.8% male and 53.2% female.
Of the city's population over the age of 25, 44.1% holds a bachelor's degree or higher.
As of the census of 2000, there were 17,006 people, 6,641 households, and 4,695 families residing in the city. The population density was 1,366.7 people per square mile (527.8/km²). There were 6,871 housing units at an average density of 552.2 per square mile (213.3/km²). The racial makeup of the city was 86.93% White, 8.73% African American, 0.11% Native American, 2.95% Asian, 0.01% Pacific Islander, 0.31% from other races, and 0.96% from two or more races. Hispanic or Latino of any race were 1.03% of the population.
There were 6,641 households out of which 35.5% had children under the age of 18 living with them, 60.7% were married couples living together, 7.7% had a female householder with no husband present, and 29.3% were non-families. 24.9% 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 2.54 and the average family size was 3.08.
In the city the population was spread out with 26.7% under the age of 18, 5.1% from 18 to 24, 35.5% from 25 to 44, 21.6% from 45 to 64, and 11.2% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 92.0 males. For every 100 females age 18 and over, there were 88.2 males.
The median income for a household in the city was $61,638, and the median income for a family was $72,634. Males had a median income of $51,489 versus $33,194 for females. The per capita income for the city was $27,708. About 1.6% of families and 2.1% of the population were below the poverty line, including 1.3% of those under age 18 and 7.4% of those age 65 or over.
Twinsburg holds a yearly festival for twins, and other multiple births, called Twins Days. Non-twins are also welcome to attend.
This festival started in 1976 and has grown to be the world's largest annual gathering of twins, with around three thousand sets attending annually. The festival attracts twins, multiples and their families from much of the world, many sets returning year after year.
Twinsburg's schools draw thir students from a suburban area located 20 miles (30 km) southeast of Cleveland and 20 miles (30 km) northeast of Akron. Local people come from a broad range of ethnic and economic origins. The area's schools form three separately governed jurisdictions: Reminderville, Twinsburg Township and the City of Twinsburg. The schools have received the "Excellent with Distinction" rating for the Ohio state tests for the 2010-11 school year.
- Wilcox Primary: Grades PK–1
- Bissell Elementary School: Grades 2–3 and in 2016 Bissell Won the National Blue Ribbon school
- Dodge Intermediate School: Grades 4–6
- R. B. Chamberlin Middle School: Grades 7–8
- Twinsburg High School: Grades 9–12
According to the Twinsburg City Schools, The "Old School" located on Darrow Road was the only school building in Twinsburg until 1957, and was closed as a public school in 1992. The Twinsburg campus of Kent State Geauga occupied the "Old School" building until building a new facility in 2012. Supporters of the "Old School" have tried to have the building placed on the National Register of Historic Places, to prevent it from being torn down for redevelopment.
The Japanese Language School of Cleveland (JLSC; クリーブランド日本語補習校 Kurīburando Nihongo Hoshūkō), a weekend Japanese supplementary school for Japanese nationals and Japanese Americans, previously had its office in Twinsburg. At the time it held its classes in Regina High School in South Euclid.
In 1817 Ethan Alling, then aged 16 came to Township Five in the tenth range of the Connecticut Land Company, also known as Millsville. Alling was to survey the 400 acres (1.6 km2) of land his Connecticut family had purchased. He is considered the first settler of the town that would be renamed Twinsburg, and eventually he became the postmaster of the town, as well as a stagecoach operator, merchant and hotel proprietor.
A pair of identical twins named Moses and Aaron Wilcox from Killingworth, Connecticut, purchased some 4,000 acres (16 km2) of land in 1819. They sold tracts at low prices to attract other settlers. The Wilcox twins offered 6 acres (24,000 m2) of land for a public square and twenty dollars to support a school school on condition that the community would change its name from Millsville to Twinsburg. They shared a business and their property. Their wives were sisters. They died on the same dqy of the same disease. They are buried together in the Locust Grove Cemetery in Twinsburg.
In 1963 The Twinsburg Historical Society was founded. It was housed in the building formerly occupied by the Twinsburg Institute (founded by Samuel Bissell, built in the 1860s. The museum run by the Historical Society holds pictures, papers and documents related to the area's history. Tools and artifacts used by early artisans and farmers, furniture, including domnestic items, clothes, and books, as well as letters and records of Twinsburg's early days are all showcased. The Mail Pouch Tobacco sign displayed on the barn was one of the last ones painted by famous barn painter, Harley Warrick.
Twinsburg is served by the Twinsburg Public Library.
|Mayor||Years in office||Notes|
|Anthony Perici||1979||1987||First full-time mayor|
- Howie Chizek, American radio personality, public address announcer and philanthropist
- Kelly Herndon, Retired NFL player for Denver Broncos, Seattle Seahawks and Tennessee Titans
- Zoltan Mesko, NFL player for Pittsburgh Steelers
- James Posey, Assistant Coach for the Cleveland Cavaliers
- Doug Tabbut, Cannonball Run/ The 2904 Record Holder
- Anoop Hans, local legend.
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- "" (Archive). Japanese Language School of Cleveland. Retrieved on April 16, 2015. "借用校住所 c/o Regina High School 1857 South Green Rd., South Euclid, OH 44121-4299 事務所住所 Japanese Language School of Cleveland 2709 Myrick Lane, Twinsburg, OH 44087"
- "北米の補習授業校一覧" (Archive). National Education Center, Japan (国立教育会館). October 29, 2000. Retrieved on April 16, 2015. "クリーブランド Japanese Language School of Cleveland（連絡先） 2224 Jesse Drive Hudson, OH.44236, U.S.A.[...]（学校所在地）c/o Regina High School 1857 South Green Rd, South Euclid, OH 44121,4299 "
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