- 2 Loans
- 3 Lobbies
- 2 Lobbies (politics)
- 1 Lobbying
- 1 Lobsters
- 1 Lobwasser, Ambrosius, 1515-1585
- 2 Lobwasser, Ambrosius, 1515-1585
- 28 Local historic districts
- 2 Locker rooms
- 2 Locker's Restaurant
- 5 Locks (Hardware)
- 3 Locks (hydraulic structures)
- 1 Locksmiths
- 1 Lockwood Manufacturing Company
- 6 Locock, Charles, Sir, 1799-1875
- 1 Locomotive of 1875.
- 14 Locomotives
- 147 Locust Street
- 1 Locust Street
- 1 Locust Street
- 2 Locust Street
- 1 Locust Street
- 1 Locust Street
- 1 Locust Street Mission
- 2 Locust Walk
- 1 Lodge Cotton Factory
- 1 Lodge, Fleetwood, Jr. -Carpet Yarn Mill
- 14 Lodging houses
- 15 Log cabins
- 2 Log houses
- 25 Logan Circle
- 11 Logan Circle
- 2 Logan Circle
- 3 Logan Circle
- 10 Logan Square
- 66 Logan Square
- 2 Logan Street
- 7 Logan, Pennsylvania
- 1 Logan, W. McGregor
- 2 Loganian Library