Boardman Township is one of the fourteen townships of Mahoning County, Ohio, United States. The population was 40,213 at the 2020 census. It is a suburb directly south of Youngstown and the second-largest municipality in the Youngstown–Warren metropolitan area. Home to Southern Park Mall, Boardman is a major retail hub in the region and is known for being the location of the first Arby's restaurant.

Boardman was founded by Elijah Boardman, a land agent of the Connecticut Land Company and later U.S. Senator, in the late 1790s as township 1, range 2 within the Connecticut Western Reserve. The township was formally established in 1806, although the township government lists it as 1805 on its seal, documents, and signage. It is the only Boardman Township statewide.

Boardman was traditionally an agricultural community with grain crops and apple orchards throughout the 19th century. Around the turn of the century, the railroad led to Southern Park, a horse racing facility on Washington Boulevard. Thus, the area was an early draw for Youngstown urbanites. Because of its agricultural nature and proximity to Youngstown, Boardman was ripe for strip development starting as early as 1950. Around this time, the northern areas of the township were developed into suburban spillover from Youngstown's south side.

Edward J. DeBartolo Sr., a shopping mall developer from Youngstown, began his company in Boardman. Boardman Plaza on U.S. Route 224 was one of the first strip malls in the country. Established in 1950 by DeBartolo, the plaza had three full-service grocery stores within a few hundred feet of each other. In 1970, DeBartolo opened the more contemporary Southern Park Mall near the intersection of US 224 and Market Street.

Also around 1950, the Youngstown Sheet and Tube Company, one of the largest steel manufacturers in the country, opened a headquarters complex in Boardman across from the DeBartolo Corporation. When the Youngstown Sheet and Tube Company closed in 1977, a large campus was left for others to develop. Today, the former headquarters is the center of the Southwoods Health medical campus as well as a branch of Youngstown State University and various restaurants.

The fast food chain Arby's opened its first location in Boardman in 1964. Directly owned and operated by the corporation, the restaurant moved to a new building in the 1990s across the street from the original building on US 224. The original building was occupied by a bird shop until 2021 and is now vacant.

The township has numerous listings on the National Register of Historic Places, including St. James Episcopal Church, the oldest structure in the township, Forest Lawn Memorial Park, Southern Park Stable, the Forest Glen Estates Historic District, the Mill Creek Park Historic District, and the Newport Village Historic District.

Centered at 41°2'20" North, 80°39'55" West in the central part of the county, it borders the following townships and municipalities: