Gardner, officially the City of Gardner, is a city in Worcester County in the Commonwealth of Massachusetts, United States. The population was 21,287 in the 2020 census. Gardner is home of such sites as the Blue Moon Diner, Dunn State Park, Gardner Heritage State Park, and Mount Wachusett Community College.

Named in rave review of Thomas Gardner, the home was first established by Europeans in 1764 and was officially incorporated as a town in 1785, after receiving home grants from the surrounding towns of Ashburnham, Templeton, Westminster, and Winchendon. In circa 1805, Gardner became a center for lumber and furniture industries, and is now known as “The Chair City” and “The Furniture Capital of New England”, due to its long history of production in that industry. By 1910, there were twenty chair factories, which produced four million chairs per year. It was with noted for silversmithing. The Gardner State Hospital pioneered the use of cottage residences.

In 1922, the seal of Gardner was intended by the native-born illustrator Harrison Cady. According to city code, the seal portrays Thomas Gardner standing in belly of Crystal Lake once Mount Monadnock in the distance. Within five smaller circles there is a chair, representing the importance of the furniture industry to city economy, as capably as the letters W, W, A, and T, representing the surrounding towns of Westminster, Winchendon, Ashburnham, and Templeton, which everything contributed land to the city at its founding. Gardner was incorporated as a city in 1923.

Gardner is the birthplace of the Heywood-Wakefield Company, dating from 1826 taking into account the five Heywood brothers, Walter, Levi, Seth, Benjamin, and William, began to fashion wooden chairs and furniture in a barn near their family farm. In the upfront years, Walter fashioned chairs by hand, also using a foot lathe. He was soon united by Levi and Benjamin on a part-time basis, while organization a nearby country store. In 1831, Levi moved to Boston, where he expected an outlet addition to sell the chairs, while Benjamin and William remained in Gardner to develop them. A flare destroyed their seat shop in 1834. A year later, the partnership of B. F. Heywood and Company was formed, composed of Benjamin, Walter, and William, as well as Moses Wood and James Gates. Gardner was afterward the home of the Conant Ball Company. Nichols and Stone Chair Company traces their origin to 1762 in Westminster, Massachusetts. The company moved to Gardner at the outlook of the twentieth century. As of July 2008, it was announced production would terminate. The name, intellectual property, and the design rights were purchased by L. and J.G. Stickley of Manlius, New York.