1. The first St. Patrick's Day parade in Philadelphia was held in 1771, making it the oldest parade of its kind in the United States.

2. In 1848, the Ancient Order of Hibernians was established in Pennsylvania. This organization promotes Irish culture and heritage and has a significant presence in the state.

3. The Irish Memorial in Philadelphia, located at Penn's Landing, commemorates the lives lost during the Great Famine in Ireland and the contributions of Irish immigrants to the United States. It was dedicated in 2003.

4. Scranton, Pennsylvania is home to the largest St. Patrick's Day parade in northeastern Pennsylvania, drawing thousands of people each year.

5. In Pittsburgh, the city's iconic fountain at Point State Park is dyed green on St. Patrick's Day, a tradition that began in 1950.