Killingly is a medium-sized town located in the state of Connecticut. With a population of 17,837 people and four associated neighborhoods, Killingly is the 66th largest community in Connecticut.

Telecommuters are a relatively large percentage of the workforce: 9.61% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. 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.

Residents will find that the town is relatively quiet. This is because it is not over-populated, and it has fewer college students, renters, and young children - all of whom can be noisy at times. So, if you're looking for a relatively peaceful place to live, Killingly is worth considering.

The education level of Killingly citizens is a little higher than the average for US cities and towns: 22.94% of adults in Killingly have at least a bachelor's degree.

The per capita income in Killingly in 2018 was $36,074, which is low income relative to Connecticut, and upper middle income relative to the rest of the US. This equates to an annual income of $144,296 for a family of four. However, Killingly contains both very wealthy and poor people as well.

Killingly is a very ethnically-diverse town. The people who call Killingly home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Killingly residents report their race to be White, followed by Black or African-American. Killingly also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 14.36% of the town’s residents. Important ancestries of people in Killingly include French, English, Irish, Italian, and French Canadian.

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