Mosgrove, Armstrong County, Pennsylvania

East Franklin Township is a township in Armstrong County, Pennsylvania, United States. The population was 3,821 at the 2020 census, a decrease from the figure of 4,082 tabulated in 2010.

Rayburn Township is a township that is located in Armstrong County, Pennsylvania, United States. The population was 1,766 at the time of the 2020 census, a decrease from the figure of 1,907 that was tabulated in 2010.

Allegheny River Lock and Dam No. 8 is a historic lock and fixed-crest dam complex located at Boggs Township and Washington Township in Armstrong County, Pennsylvania. It was built between 1929 and 1931 by the United States Army Corps of Engineers, and consists of the lock, dam, esplanade, and Operations Building. The lock measures 56 feet by 360 feet, and has a lift of 17.8 feet. The dam measures approximately 50 feet high and 916 feet long; a three-foot addition was built on top of the dam in 1937. The Operations Building, or powerhouse, is a utilitarian two-story building in a vernacular early-20th century revival style. The lock and dam were built by the U.S. Army Corps of Engineers as a part of an extensive system of locks and dams to improve navigation along the Allegheny River.It was listed on the National Register of Historic Places in 2000.

Cowanshannock Creek (the eastern section is sometimes referred to as the North Branch Cowanshannock Creek) is a tributary of the Allegheny River in Armstrong and Indiana counties, Pennsylvania in the United States.

Gosford is an unincorporated community in Rayburn Township, Armstrong County, Pennsylvania, United States. The community is situated approximately 3 miles (4.8 km) northeast of Kittanning at the place where Cowanshannock Creek joins the Allegheny River.

Pine Furnace is an unincorporated community in Valley Township, Armstrong County, Pennsylvania, United States.

Armstrong County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 65,558. The county seat is Kittanning. The county was organized on March 12, 1800, from parts of Allegheny, Westmoreland and Lycoming Counties. It was named in honor of John Armstrong, who represented Pennsylvania in the Continental Congress and served as a major general during the Revolutionary War. Armstrong County is included in the Pittsburgh, PA Metropolitan Statistical Area.

Boggs Township is a township in Armstrong County, Pennsylvania, United States. The population was 813 at the 2020 census, a decrease from the figure of 936 tabulated in 2010.

West Valley is an unincorporated community in Armstrong County, Pennsylvania, United States.

Adrian is an unincorporated community in Armstrong County, Pennsylvania, United States. The community is 4.8 miles (7.7 km) north of Kittanning. Adrian has a post office with ZIP code 16210. Adrian, along with the rest of Armstrong County, is part of the Pittsburgh metropolitan area.

Armstrong County Courthouse and Jail is a historic courthouse complex located at Kittanning, Armstrong County, Pennsylvania. The courthouse was built between 1858 and 1860, and is a two-story, brick and stone building measuring 105 feet by 65 feet. It has a hipped roof topped by an octagonal cupola and bell. It features a portico with four Corinthian order columns in Greek Revival style. A three-story rear addition was built in 1951-1953. The jail building was built between 1870 and 1873. It is constructed of stone, brick, and iron, and measures 114 feet by 50 feet, with a 96 feet tall tower. The building once housed 24, 8 foot by 13 foot cells.It was listed on the National Register of Historic Places in 1981.

Kittanning ( ki-TAN-ing) is a borough in and the county seat of Armstrong County, Pennsylvania, United States. It is situated 36 miles (58 km) northeast of Pittsburgh, along the east bank of the Allegheny River. The population was 3,921 at the 2020 census. The name is derived from Kithanink, which means 'on the main river' in Lenape or the Delaware language, from kit- 'big' + hane 'mountain river' + -ink (suffix used in place names). "The main river" is a Lenape term for the Allegheny and Ohio combined, which they considered as all one river. The borough and its bridge have been used as a setting for several recent films.