- February 2, 1854 - The Act of Consolidation is passed, consolidating all of Philadelphia County into the City of Philadelphia.
- February 5, 1824 - The Franklin Institute is founded by Samuel Vaughan Merrick and William H. Keating.
- February 12, 1875 - The Roman Catholic Diocese of Philadelphia is elevated to level of Archdiocese of Philadelphia.
- February 25, 1957 - The body of unsolved murder victim Joseph Augustus Zarelli, unidentified until December 2022 and dubbed the "Boy in the Box", is found.
