Area codes 610 and 484

Upper Merion Township is a township in Montgomery County, Pennsylvania, United States. The population was 28,395 at the 2010 U.S. Census. Located 16 miles (26 km) from Philadelphia, it consists of the villages of Gulph Mills, King of Prussia, Swedeland, Swedesburg, and portions of Radnor and Wayne. The westernmost part of the township comprises the largest part of the 1,300-acre (5 km2) Valley Forge National Historical Park. The township is the home of the King of Prussia mall. King of Prussia also contains a major office park hosting firms such as Lockheed Martin and GlaxoSmithKline. The name Merion originates with the county of Merioneth in north Wales. Merioneth is an English-language translation of the Welsh Meirionnydd, itself named after Meirchion (or Meirion), grandson of Cunedda Wledig (b. ca. 380 A.D.), King of North Wales.

Hughes Park station is a SEPTA rapid transit station in Upper Merion Township, Pennsylvania. It serves the Norristown High Speed Line (Route 100) and is located at Yerkes Road and Crooked Lane. All trains stop at Hughes Park. Trains known as the Hughes Park Express terminate here and operate to 69th Street, skipping certain stops along the way. The station lies 11.0 track miles from 69th Street Terminal.

DeKalb Street station, formerly known as King Manor station, is a SEPTA rapid transit station in Bridgeport, Pennsylvania. It serves the Norristown High Speed Line (Route 100) and is located on Ford Street near DeKalb Street (U.S. Route 202), although SEPTA gives the address as Ford Street and Crooked Lane. All trains stop at DeKalb Street. The station lies 12.3 track miles from 69th Street Terminal. SEPTA changed the station name on September 5, 2010. The platform reflects the new name while the street sign retains the King Manor name.

Bridgeport station is a SEPTA rapid transit station in Bridgeport, Pennsylvania. It serves the Norristown High Speed Line (Route 100). The station is located on Sixth Street near DeKalb Street (US 202), although SEPTA's official website gives the address as being near 5th and Merion Streets. All trains stop at Bridgeport. The station lies 12.8 track miles from 69th Street Terminal.

Gulph Mills station is a SEPTA rapid transit station in Gulph Mills, Pennsylvania. It serves the Norristown High Speed Line (Route 100) and is officially located at Trinity Road and Crest Lane in Upper Merion Township, however another parking lot can be found across the tracks on South Gulph Road. This parking lot is only accessible for northbound drivers along South Gulph Road, though. All trains stop at Gulph Mills. Transfers are available for buses to the King of Prussia mall. The station lies 10.3 track miles from 69th Street Terminal. There is off-street parking available at this station.

Bridgeport is a borough in Montgomery County, Pennsylvania, 18 mi (29 km) north of Philadelphia on the Schuylkill River. Former industries included paper, flour, cotton, woolen mills, steel works, and brickyards. Bridgeport is 6 mi (9.7 km) east of Valley Forge, Pennsylvania. In 1777, during the American Revolutionary War, General George Washington and the Continental Army passed through Bridgeport on their way to their winter encampment in Valley Forge. 3,097 people lived in Bridgeport in 1900; 3,860 in 1910; and 5,904 in 1940. The population was 4,554 at the 2010 census.

Upper Merion Area High School is a comprehensive public high school, operated by the Upper Merion Area School District, in the King of Prussia census-designated place, in Upper Merion Township, Pennsylvania, in the Philadelphia metropolitan area, United States. A building project to construct a new high school facility began in spring 2020, and is scheduled to be completed in September, 2022.

Bridge in Upper Merion Township is a historic stone arch bridge located at Gulph Mills in Upper Merion Township, Montgomery County, Pennsylvania. The bridge was built in 1789. It has a single 20-foot-long (6.1 m) span with a width of 34 feet (10.4 m), and an overall length of 100-foot (30 m). The bridge crosses Gulph Creek.It was listed on the National Register of Historic Places in 1988. The Bridge in Upper Mention is, as of August 2021, the fifth oldest bridge in use in the United States. In 2021, the bridge structure was repaired and rehabilitated by contractor J.D. Eckman, with 100% funding from PennDOT.[1]

Gulph Mills is an unincorporated community in Upper Merion Township, Montgomery County, Pennsylvania. It is served by the Upper Merion Area School District. There is a station on the Norristown High Speed Line. A grist mill built here in 1747 supplied flour to the Continental Army during their stay at Valley Forge. General George Washington's army encamped in the area for a week before departing for winter quarters at Valley Forge. Washington used the area as an ammunition depot during the autumn of 1777. The encampment is marked by a memorial erected by the Sons of the American Revolution in 1893. Another attraction here is the "Hanging Rock", a major distraction on Pennsylvania Route 320. Hanging Rock reportedly holds importance as a place by which George Washington led his troops. PennDOT has looked to remove Hanging Rock, but preservationists have battled such action since the 1970s. The Bridge in Upper Merion Township and Hanging Rock are listed on the National Register of Historic Places.

Poplar Lane, also known as "Ballygomingo," is a historic home located near King of Prussia in Upper Merion Township, Montgomery County, Pennsylvania. The original house was built in 1758, and expanded in 1816 and about 1821. It is a two-story, stucco over stone building. It features a portico.It was added to the National Register of Historic Places in 1978.

The Armenian Sisters Academy (ASA; Armenian: Հայ քույրերի վարժարան) is a Pre-K through eighth grade institution located in the Philadelphia, Pennsylvania suburb of Upper Merion Township, Pennsylvania, with a Radnor postal address. It is in proximity to Radnor Township. Its campus is a former estate.The name is also shared by two sister schools founded later in Boston and Los Angeles. The Armenian Sisters Academy is run by Sister Emma and Sister Hovanna who teach Armenian and religion classes, while a mostly American faculty teach homeroom classes.

Hanging Rock, also known as Overhanging Rock, or locally as Drummond's head, is a historic natural feature located in Gulph Mills, Upper Merion Township, Montgomery County, Pennsylvania. It is a large natural outcropping of phyllite that protrudes approximately eight feet over the roadway. The roadway, Pennsylvania Route 320 (S Gulph Road), was laid out as a public highway in 1711–1712. The road was traveled by General George Washington and the Continental Army into Valley Forge for the winter encampment of 1777–1778. The rock was dedicated as a memorial to that march by the Valley Forge Historical Society in 1924. In 1917 and 1954 holes were drilled into Hanging Rock for dynamite in an effort to remove the rock. This, along with erosion and vehicle collisions, has changed the shape of the rock over time. The "overhang" of the rock has decreased since the invention of the automobile as car crashes have chipped away at the rock over the years.It was listed on the National Register of Historic Places in 1997.