Fairfield is a medium-sized city located in the state of Ohio. With a population of 44,456 people and ten associated neighborhoods, Fairfield is the 27th largest community in Ohio.

Also of interest is that Fairfield has more people living here who work in computers and math than 95% of the places in the US.

A relatively large number of people in Fairfield telecommute to their jobs. Overall, about 7.42% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

The overall education level of Fairfield citizens is substantially higher than the typical US community, as 30.08% of adults in Fairfield have at least a bachelor's degree, and the average American community has 21.84%.

The per capita income in Fairfield in 2022 was $37,076, which is upper middle income relative to Ohio and the nation. This equates to an annual income of $148,304 for a family of four. However, Fairfield contains both very wealthy and poor people as well.

Fairfield is an extremely ethnically-diverse city. The people who call Fairfield home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Fairfield residents report their race to be White, followed by Black or African-American. Important ancestries of people in Fairfield include German, Irish, English, Italian, and African.

The most common language spoken in Fairfield is English. Other important languages spoken here include Spanish and Chinese.