The population of Marion Height City, Ohio, was 15,431 people as of the 2010 census. The median age was 36.2 years. The population was spread out among five ages groups: under the age of 18, from 18 to 24 years, and from 25 to 44 years. There were also a number of middle-aged and older residents. The median age was 36 years, and the population was overwhelmingly male. Males outnumbered females by 88.6 to one, and there were eighty-three male residents for every 100 females.
In 1849, Marion Town was established on farmland. The town's population fluctuated between 300 and 500 people. Its population dropped during the Civil War, but started to grow again by the 1890s. Today, Marion is home to a large number of families and businesses. It has a business-friendly climate and a diverse population. The city's location has led to its growth over the years.
The town of Marion is one of the smaller communities in Pennsylvania. It is home to a single neighborhood, the Heights. According to the 2010 Census, the population was 5,968 people. This was down six percent from the decade before. The area's male to female ratio was a close match at 33:1.
The town is divided by the Norfolk and Western Railroad, which runs along the Middle Fork of the Holston River. This railroad bisects the city in half, depriving the northern section of desirable access to Marion's central business district and downtown area. The noise from the railroad also discourages new residential development and rehabilitation. The city also has limited parking spaces and a high concentration of commercial properties.