Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Lower Nike Park | Park | 83 | Bucks | 40 14 19 N | 075 09 53 W |
| Lower Open Brook School | School | 507 | McKean | 41 50 00 N | 078 21 32 W |
| Lower Orchard | Locale | 18 | Bucks | 40 08 30 N | 074 52 38 W |
| Lower Owl Creek Dam | Dam | 318 | Schuylkill | 40 47 30 N | 075 56 05 W |
| Lower Path Valley Cemetery | Cemetery | 226 | Franklin | 40 03 11 N | 077 50 41 W |
| Lower Paxton Junior High School | School | 165 | Dauphin | 40 19 07 N | 076 47 10 W |
| Lower Peanut | Populated Place | 278 | Fayette | 39 58 28 N | 079 45 45 W |
| Lower Pennridge High School | School | 123 | Bucks | 40 23 18 N | 075 16 23 W |
| Lower Perkiomen Valley County Park | Park | 36 | Montgomery | 40 07 48 N | 075 26 59 W |
| Lower Pine Bottom Run | Stream | | Lycoming | 41 18 51 N | 077 22 49 W |
| Lower Pine Run | Stream | | Cameron | 41 16 58 N | 078 07 35 W |
| Lower Pine Run School | School | 211 | Carbon | 40 52 11 N | 075 37 18 W |
| Lower Plum Creek School (historical) | School | 166 | Northumberland | 40 50 56 N | 076 44 14 W |
| Lower Pottsgrove Elementary School | School | 85 | Montgomery | 40 15 03 N | 075 35 35 W |
| Lower Providence Post Office (historical) | Post Office | 65 | Montgomery | 40 10 56 N | 075 26 02 W |
| Lower Rausch Creek | Stream | | Schuylkill | 40 35 19 N | 076 24 38 W |
| Lower Rickards Dam | Dam | 325 | Pike | 41 13 24 N | 074 55 41 W |
| Lower Ridge School | School | 222 | Perry | 40 27 46 N | 077 11 24 W |
| Lower Roxborough Reservoir | Reservoir | 114 | Philadelphia | 40 03 01 N | 075 14 18 W |
| Lower Salford Elementary School | School | 92 | Montgomery | 40 16 22 N | 075 23 07 W |
| Lower Saucon | Populated Place | 103 | Northampton | 40 36 22 N | 075 16 57 W |
| Lower Saucon Elementary School | School | 154 | Northampton | 40 35 00 N | 075 19 07 W |
| Lower Saucon School | School | 158 | Northampton | 40 36 00 N | 075 18 47 W |
| Lower Sheriff Run | Stream | | Forest | 41 37 04 N | 079 06 53 W |
| Lower Skippack Church | Church | 76 | Montgomery | 40 12 17 N | 075 24 27 W |
| Lower Southampton Elementary School | School | 77 | Bucks | 40 09 21 N | 074 59 47 W |
| Lower Southampton Industrial Park | Locale | 66 | Bucks | 40 09 00 N | 075 00 41 W |
| Lower Star School (historical) | School | 372 | Centre | 41 06 05 N | 078 05 00 W |
| Lower Tannersville | Populated Place | 257 | Monroe | 41 01 54 N | 075 17 60 W |
| Lower Three Runs | Stream | | Clearfield | 41 09 12 N | 078 02 23 W |
| Lower Tumbling Run Dam | Dam | 189 | Schuylkill | 40 40 30 N | 076 10 53 W |
| Lower Tuscarora Church and Cemetery | Cemetery | 207 | Juniata | 40 29 51 N | 077 29 24 W |
| Lower Twin Dam | Dam | 454 | Wayne | 41 51 16 N | 075 20 02 W |
| Lower Twin Lake | Reservoir | 454 | Wayne | 41 51 26 N | 075 20 13 W |
| Lower Twin Lake Dam | Dam | 456 | Wayne | 41 51 18 N | 075 20 05 W |
| Lower Twomile Run | Stream | | Venango | 41 22 20 N | 079 48 04 W |
| Lower Vag Hollow | Valley | | Potter | 41 32 14 N | 077 59 05 W |
| Lower Whyel | Populated Place | 278 | Westmoreland | 40 13 25 N | 079 40 55 W |
| Lower Wilcox Pond | Reservoir | 399 | Wayne | 41 37 24 N | 075 12 59 W |
| Lower Wilcox Pond Dam | Dam | 399 | Wayne | 41 37 10 N | 075 13 28 W |
| Lower Wood Pond Dam | Dam | 431 | Wayne | 41 44 18 N | 075 16 11 W |
| Lower Woods Pond | Reservoir | 429 | Wayne | 41 44 18 N | 075 16 13 W |
| Lower Yoder Fire Tower | Tower | 814 | Cambria | 40 22 15 N | 078 59 02 W |
| Lowery Knob | Summit | 377 | Fulton | 39 50 55 N | 078 02 18 W |
| Lowhill | Populated Place | 297 | Washington | 40 00 36 N | 079 57 03 W |
| Lowhill | Summit | 210 | Lehigh | 40 39 15 N | 075 41 00 W |
| Lowhill Church | Church | 197 | Lehigh | 40 38 45 N | 075 41 10 W |
| Lowhill School | School | 197 | Lehigh | 40 38 45 N | 075 41 10 W |
| Lowman School (historical) | School | 495 | Indiana | 40 46 08 N | 079 00 44 W |
| Lowrey Run | Stream | | Butler | 41 10 20 N | 079 41 38 W |
| Lowries Run | Stream | | Allegheny | 40 30 19 N | 080 05 21 W |
| Lows Island | Island | 89 | York | 40 04 58 N | 076 41 05 W |
| Lowville | Populated Place | 396 | Erie | 42 01 29 N | 079 49 17 W |
| Loyal Plaza Shopping Center | Locale | 160 | Lycoming | 41 14 54 N | 076 57 29 W |
| Loyalhanna | Populated Place | 303 | Westmoreland | 40 19 21 N | 079 21 44 W |
| Loyalhanna 6 Mile Stations | Locale | 674 | Somerset | 40 08 08 N | 078 48 55 W |
| Loyalhanna Creek | Stream | | Westmoreland | 40 29 07 N | 079 27 16 W |
| Loyalhanna Dam | Dam | 274 | Westmoreland | 40 27 24 N | 079 27 06 W |
| Loyalhanna Dam | Dam | 315 | Westmoreland | 40 14 12 N | 079 27 05 W |
| Loyalhanna Elementary School | School | 354 | Westmoreland | 40 18 56 N | 079 21 49 W |
| Loyalhanna Gorge | Valley | | Westmoreland | 40 15 47 N | 079 17 14 W |
| Loyalhanna Lake | Reservoir | 274 | Westmoreland | 40 27 24 N | 079 27 06 W |
| Loyalhanna Lake National Recreation Area | Park | 274 | Westmoreland | 40 26 24 N | 079 26 11 W |
| Loyalhanna Woodlands Number 1 | Populated Place | 367 | Westmoreland | 40 27 04 N | 079 26 28 W |
| Loyalhanna Woodlands Number 2 | Populated Place | 349 | Westmoreland | 40 27 08 N | 079 27 46 W |
| Loyalsock (historical) | Populated Place | 158 | Lycoming | 41 13 45 N | 076 53 41 W |
| Loyalsock Creek | Stream | | Lycoming | 41 14 05 N | 076 56 34 W |
| Loyalsock Creek Gorge | Valley | | Sullivan | 41 24 09 N | 076 44 35 W |
| Loyalsock State Game Farm | Park | 180 | Lycoming | 41 19 05 N | 076 55 12 W |
| Loyalsock Trail | Trail | 591 | Sullivan | 41 25 03 N | 076 36 39 W |
| Loyalsock Valley School | School | 186 | Lycoming | 41 18 56 N | 076 54 28 W |
| Loyalsockville | Populated Place | 193 | Lycoming | 41 19 15 N | 076 54 34 W |
| Loyalton | Populated Place | 176 | Dauphin | 40 34 08 N | 076 45 42 W |
| Loyalville | Populated Place | 403 | Luzerne | 41 20 10 N | 076 05 57 W |
| Loysburg | Populated Place | 339 | Bedford | 40 09 39 N | 078 22 30 W |
| Loysburg Gap | Populated Place | 341 | Bedford | 40 09 35 N | 078 21 57 W |
| Loysville | Populated Place | 180 | Perry | 40 21 56 N | 077 20 40 W |
| Lu Lu Temple Country Club | Locale | 73 | Montgomery | 40 07 29 N | 075 10 01 W |
| Lucas Run | Stream | | Clearfield | 41 09 59 N | 078 04 29 W |
| Lucas Run | Stream | | Jefferson | 41 17 04 N | 078 55 35 W |
| Lucas Station | Building | 267 | Allegheny | 40 25 09 N | 079 57 48 W |
| Lucasville | Populated Place | 377 | Butler | 40 52 38 N | 079 46 38 W |
| Lucasville Station (historical) | Locale | 360 | Butler | 40 52 45 N | 079 46 41 W |
| Luce Hill | Summit | 410 | Susquehanna | 41 41 16 N | 075 57 47 W |
| Lucerne Dam | Dam | 400 | Indiana | 40 34 06 N | 079 07 11 W |
| Lucerne Mines | Populated Place | 350 | Indiana | 40 33 32 N | 079 09 04 W |
| Luces Corners | Populated Place | 409 | Crawford | 41 36 58 N | 079 49 59 W |
| Lucesco Post Office (historical) | Post Office | 241 | Westmoreland | 40 40 38 N | 079 39 59 W |
| Luciana Bottoms | Bend | 350 | Huntingdon | 40 15 57 N | 078 02 14 W |
| Lucinda | Populated Place | 470 | Clarion | 41 18 30 N | 079 22 11 W |
| Luciusboro | Populated Place | 508 | Indiana | 40 30 38 N | 079 07 20 W |
| Lucket | Populated Place | 634 | Cambria | 40 27 49 N | 078 37 11 W |
| Lucknow | Populated Place | 136 | Dauphin | 40 19 39 N | 076 53 09 W |
| Lucky | Populated Place | 159 | York | 39 54 13 N | 076 26 44 W |
| Lucky Run | Stream | | Lackawanna | 41 24 45 N | 075 42 00 W |
| Lucky Run | Stream | | Monroe | 41 09 23 N | 075 14 04 W |
| Lucon | Populated Place | 77 | Montgomery | 40 14 06 N | 075 24 57 W |
| Lucore Hollow | Valley | | Cameron | 41 33 38 N | 078 12 09 W |
| Lucullus | Populated Place | 604 | Lycoming | 41 22 08 N | 077 32 24 W |
| Lucus Run | Stream | | Clinton | 41 07 10 N | 077 19 59 W |
| Lucy Furnace | Populated Place | 196 | Mifflin | 40 23 36 N | 077 53 09 W |
| Lucy Furnace School | School | 230 | Mifflin | 40 23 49 N | 077 52 54 W |
| Lucyville | Locale | 234 | Fayette | 40 04 40 N | 079 53 05 W |
| Ludington Run | Stream | | Potter | 41 56 20 N | 077 48 44 W |
| Ludlow | Populated Place | 485 | McKean | 41 43 42 N | 078 56 36 W |
| Ludlow (subdivision) | Populated Place | 10 | Philadelphia | 39 58 19 N | 075 08 47 W |
| Ludlow School | School | 10 | Philadelphia | 39 58 20 N | 075 08 46 W |
| Ludlow School (historical) | School | 490 | McKean | 41 43 32 N | 078 56 08 W |
| Ludlow Trail | Trail | 599 | McKean | 41 45 33 N | 078 56 42 W |
| Ludwick School | School | 349 | Westmoreland | 40 18 06 N | 079 33 18 W |