Lebanon, formerly known as Steitztown, is a city in and the county seat of Lebanon County, Pennsylvania, United States. The population was 25,477 at the 2010 census, a 4.2% increase from the 2000 count of 24,461. Lebanon is located in the central part of the Lebanon Valley, 26 miles (42 km) east of Harrisburg and 29 miles (47 km) west of Reading in Pennsylvania.

Lebanon was first settled in 1720 by early settlers, many with the family names of "Steitz" and "Light", along a creek that was then named "Steitz Creek". The Light patriarchs built an Indian Fort and named it "Light's Fort" during this time. The town was laid out in 1753. The town was incorporated as a borough on February 20, 1821 and became a city on November 25, 1885. It adopted the commission form of government, consisting of four councilmen and a mayor. In 1900, 17,628 people lived in Lebanon; in 1910, 19,240 people lived there; in 1920, 24,643 people lived there; and in 1940, 27,206 people lived in Lebanon, Pennsylvania.

Lebanon bologna was first made here. Lebanon was formerly home to a major steel mill operated by Bethlehem Steel.

Lebanon (ⁱ/ˈlɛbənɒn/ or /ˈlɛbənən/; Arabic: لبنان‎ Libnān or Lubnān, Lebanese Arabic: [lɪbˈneːn]), officially the Lebanese Republic (Arabic: الجمهورية اللبنانية‎ al-Jumhūrīyah al-Libnānīyah, Lebanese Arabic: [elˈʒʊmhuːɾɪjje l.ˈlɪbneːnɪjje]), is a country in the East Mediterranean. It is bordered by Syria to the north and east, and Israel to the south. Lebanon's location at the crossroads of the Mediterranean Basin and the Arabian hinterland has dictated its rich history, and shaped a cultural identity of religious and ethnic diversity.

The earliest evidence of civilization in Lebanon dates back more than 7,000 years—predating recorded history. Lebanon was the home of the Phoenicians, a maritime culture that flourished for nearly 2,500 years (3000–539 BC). Following the collapse of the Ottoman Empire after World War I, the five provinces that comprise modern Lebanon were mandated to France. The French expanded the borders of Mount Lebanon, which was mostly populated by Maronite Catholics and Druze, to include more Muslims. Lebanon gained independence in 1943, and established a unique political system, known as confessionalism, a power-sharing mechanism based on religious communities – Bechara El Khoury who became independent Lebanon's first President and Riad El-Solh, who became Lebanon's first prime minister, are considered the founders of the modern Republic of Lebanon and are national heroes for having led the country's independence. French troops withdrew from Lebanon in 1946.

Pennsylvania (ⁱ/ˌpɛnsɨlˈveɪnjə/), officially the Commonwealth of Pennsylvania, is a US state that is located in the Northeastern and Mid-Atlantic regions of the United States, and the Great Lakes Region. The state borders Delaware to the southeast, Maryland to the south, West Virginia to the southwest, Ohio to the west, Ontario, Canada to the northwest, New York to the north, and New Jersey to the east.

Pennsylvania is the 33rd most extensive, the 6th most populous, and the 9th most densely populated of the 50 United States. The state's four most populous cities are Philadelphia, Pittsburgh, Allentown, and Erie. The state capital is Harrisburg. Pennsylvania has 51 miles (82 km) of shoreline along Lake Erie and 57 miles (92 km) of shoreline along the Delaware Estuary.

Pennsylvania is 170 miles (274 km) north to south and 283 miles (455 km) east to west. Of a total 46,055 square miles (119,282 km²), 44,817 square miles (116,075 km²) are land, 490 square miles (1,269 km²) are inland waters, and 749 square miles (1,940 km²) are waters in Lake Erie. It is the 33rd largest state in the United States. Pennsylvania has 51 miles (82 km) of coastline along Lake Erie and 57 miles (92 km) of shoreline along the Delaware Estuary.