| Lafferty | S | Conemaugh Twp |
| Laher | F | Rayne Twp |
| Laird | F | Saltsburg, Conemaugh Twp |
| Laird | H P | Saltsburg, Conemaugh Twp |
| Laird | J | Blacklick Twp |
| Laird | Z | Young Twp |
| Lamon | J | Brush Valley Twp |
| Laney | Dr | Blairsville, Burrell Twp |
| Laney | John | Indiana Borough, White Twp |
| Lang | Armstrong Twp | |
| Langem | J | Montgomery Twp |
| Lapsley | G | Cherryhill Twp |
| Lapsley | J | Cherryhill Twp |
| Lapsly | Wm | Wheatfield Twp |
| Laris? | S | Rayne Twp |
| Latimer | Wm | Blacklick Twp |
| Laughlin | Jos | Center Twp |
| Laughlin | T | White Twp |
| Laughlin | T J | Blairsville, Burrell Twp |
| Laughrey | A | Burrell Twp |
| Laughrey | Wm | Saltsburg, Conemaugh Twp |
| Law | J | Washington Twp |
| Learn | A | Green Twp |
| Learn | A | Green Twp |
| Learn | J | Green Twp |
| Learn | J, Jr | Green Twp |
| Learn | J, Sr | Green Twp |
| Leasure | A Y | East Mahoning Twp |
| Leasure | P | Green Twp |
| Leech | J | Conemaugh Twp |
| Leichteberger | J H | Indiana Borough, White Twp |
| Leisure | Mrs. | Canoe Twp |
| Lemon | J | Pine Twp |
| Lenns | J | South Mahoning Twp |
| Leonard | J | Pine Twp |
| Lewis | E | East Mahoning Twp |
| Lewis | E | Young Twp |
| Lewis | E L | South Mahoning Twp |
| Lewis | G | Canoe Twp |
| Lewis | J | Green Twp |
| Lewis | J | Rayne Twp |
| Lewis | J | Rayne Twp |
| Lewis | J | South Mahoning Twp |
| Lewis | J | Washington Twp |
| Lewis | J | White Twp |
| Lewis | J K | Montgomery Twp |
| Lewis | Mrs. | Cherryhill Twp |
| Lewis | W | Canoe Twp |
| Lewis | Wm | Indiana Borough, White Twp |
| Libengood | C | Conemaugh Twp |
| Liggat | J | Wheatfield Twp |
| Lightcap | G | Rayne Twp |
| Lightcap | S | Rayne Twp |
| Lightcap | East Mahoning Twp | |
| Like | G | Canoe Twp |
| Limerick | O | East Mahoning Twp |
| Lindsey | J | Blairsville, Burrell Twp |
| Lindsey | Jas | West Mahoning Twp |
| Lindsey | Wm | West Mahoning Twp |
| Ling | Wm | Wheatfield Twp |
| Lingafelt | Jos | Montgomery Twp |
| Linter | D | Burrell Twp |
| Linter | Wm | Burrell Twp |
| Little | A | Rayne Twp |
| Little | R | Rayne Twp |
| Lockart | D | Cherryhill Twp |
| Lockart | David | Cherryhill Twp |
| Logan | T | Canoe Twp |
| Lomer? | Paul | Pine Twp |
| Lomison | J | Center Twp |
| Long | A | Green Twp |
| Long | A | Green Twp |
| Long | C | Cherryhill Twp |
| Long | C | Rayne Twp |
| Long | C | Rayne Twp |
| Long | J | Center Twp |
| Long | J | Cherryhill Twp |
| Long | J | Rayne Twp |
| Long | M | West Mahoning Twp |
| Long | Mrs. | Indiana Borough, White Twp |
| Long | P | Green Twp |
| Long | S | Blacklick Twp |
| Long | Wm | Cherryhill Twp |
| Long | Wm | Conemaugh Twp |
| Long | Wm | Rayne Twp |
| Long | Wm | Washington Twp |
| Longnecker | P | Cherryhill Twp |
| Longstreth | S | White Twp |
| Longwell | T | Rayne Twp |
| Lose | C | Burrell Twp |
| Loughrey | A | White Twp |
| Loughrey | J | Burrell Twp |
| Loughrey | J | Burrell Twp |
| Loughrey | J | Cherryhill Twp |
| Loughrey | M | Cherryhill Twp |
| Loughrey | Mrs. | White Twp |
| Loughrey | Wm | White Twp |
| Louless | H | Montgomery Twp |
| Love | J A | Blairsville, Burrell Twp |
| Love | T | Wheatfield Twp |
| Low | C | West Mahoning Twp |
| Lower | D | Cherryhill Twp |
| Lowers | G | Brush Valley Twp |
| Lowman | A | Brush Valley Twp |
| Lowman | A | East Mahoning Twp |
| Lowman | A | Green Twp |
| Lowman | G | Armstrong Twp |
| Lowman | J | Center Twp |
| Lowman | J | Rayne Twp |
| Lowman | M | Armstrong Twp |
| Lowman | S | Young Twp |
| Lowman | T | Young Twp |
| Lowman | Wm | Armstrong Twp |
| Lowman | Wm | Indiana Borough, White Twp |
| Lowmaster | J | Canoe Twp |
| Lowmaster | J | Canoe Twp |
| Lowmaster | L | East Mahoning Twp |
| Lowry | D | Young Twp |
| Lowry | J | Center Twp |
| Lowry | R | Armstrong Twp |
| Lowry | S | Montgomery Twp |
| Lowry | S, Sr | White Twp |
| Lowry | White Twp | |
| Lowry? | J | Conemaugh Twp |
| Lowxxx? | C | Wheatfield Twp |
| Loyd | R | White Twp |
| Lubeng? | O | South Mahoning Twp |
| Lucas | A | Armstrong Twp |
| Lucas | J | Armstrong Twp |
| Lucas | J | Armstrong Twp |
| Lucas | J | Center Twp |
| Lucas | S | Washington Twp |
| Lucas | Thos | Armstrong Twp |
| Lukehart | C | South Mahoning Twp |
| Lunger | J | Canoe Twp |
| Luther | A | Wheatfield Twp |
| Luts | G | Rayne Twp |
| Luts | Mrs. | Rayne Twp |
| Lyda | Wm | Pine Twp |
| Lydick | A | Cherryhill Twp |
| Lydick | A | East Mahoning Twp |
| Lydick | A | Green Twp |
| Lydick | J | Cherryhill Twp |
| Lydick | J | East Mahoning Twp |
| Lydick | J | Green Twp |
| Lydick | J | Montgomery Twp |
| Lydick | J | North Mahoning Twp |
| Lydick | J L | Green Twp |
| Lydick | M | Green Twp |
| Lydick | P | Indiana Borough, White Twp |
| Lydick | P | South Mahoning Twp |
| Lydick | R | Cherryhill Twp |
| Lydick | S | Green Twp |
| Lydick | T | Cherryhill Twp |
| Lydick | Wm | South Mahoning Twp |
| Lynn | J | Wheatfield Twp |
| Lyon | A | Conemaugh Twp |
| Lyon | Mrs. | Conemaugh Twp |
| Lyons | Mrs. | Blacklick Twp |
| Lyons | Wm | Blacklick Twp |
| Lytle | A | West Mahoning Twp |
| Lytle | J | Center Twp |
| Lytle | J, Jr. | Center Twp |
| Lytle | R | West Mahoning Twp |
| Lytle | S | South Mahoning Twp |
| Lytle | Wm | Conemaugh Twp |
Indiana County, PA