Steuben Co.
| P.S. Lashbrook | Spencer Co. |
| Abraham Lasher | Perry Co. |
| James Lasher | Perry Co. |
| Hon. Charles B. Lasselle | Cass Co. |
| Gen. Hyacinth Lasselle | Cass Co. |
| Charles Latchem | Wabash Co. |
| John B. Latchem | Wabash Co. |
| Paul Earl Latchem | Indiana State-wide Biographies |
| Clarence Elmer Lathan | Clay Co. |
| Dora E. Latham | Clay Co. |
| Harry Lathrop | Decatur Co. |
| James B. Lathrop | Decatur Co. |
| John Lathrope, Jr. | Carroll Co. |
| Marion M. Latimer | Kosciusko Co. |
| Henry LaTourette | Fountain Co. |
| Schuyler LaTourette | Fountain Co. |
| Ephraim Latta | LaGrange Co. |
| James M. Latta | Elkhart Co. |
| Milton Miller Latta, M.D. | Elkhart Co. |
| C. Herbert Laub, Ph.D. | Indiana State Bios |
| Joseph Charles Lauber | Indiana State Bios |
| Jacob Laubscher | Vanderburgh Co. |
| John W. Laubscher | Vanderburgh Co. |
| Levi A. Lauderback | Clay Co. |
| Charles E. Laughlin | Indiana State Bios |
| E.D. Laughlin | Orange Co. |
| Joseph Laughlin | Daviess Co. |
| Linden Laughlin | Morgan Co. |
| Samuel H. Laughlin | Boone Co. |
| J.T. Frank Laughner | Boone Co. |
| Isaac Lauman | Fountain Co. |
| Father Laurence, C.S.C. | St. Joseph Co. |
| Joseph Laurent | Perry Co. |
| Rev. John Lautenschlager | Dubois Co. |
| Rev. John F. Lautenschlager | Owen Co. |
| Ezra E. Lautzenheiser | DeKalb Co. |
| Jacob H. Lautzenheiser | DeKalb Co. |
| Augustus Laux | Vigo Co. |
| John Laval | Indiana State Bios |
| James Callistus Lavelle | Daviess Co. |
| Thomas J. Lavelle | Daviess Co. |
| Daniel Lavengood | Wabash Co. |
| John Lavengood | Miami Co. |
| Norva P. Lavengood | Wabash Co. |
| Harvey R. Lavering | Whitley Co. |
| J.H. Law | Johnson Co. |
| Joseph Law | Newton Co. |
| William Law | Johnson Co. |
| Charles H. Lawburgh | Spencer Co. |
| James G. Lawhead | DeKalb Co. |
| Samuel Lawhead | DeKalb Co. |
| William B. Lawhead | DeKalb Co. |
| John C. Lawler | Washington Co. |
| Frank R. Lawless | Posey Co. |
| Catherine Maria (Schaeffer) Lawrence | Delaware Co. |
| David Lawrence | DeKalb Co. |
| George W. Lawrence | Whitley Co. |
| Isaac Wilson Lawrence | Crawford Co. |
| Isaiah Esaes Lawrence, M.D. | Indiana State Bios |
| John W. Lawrence | DeKalb Co. |
| Philip M. Lawrence | Miami Co. |
| Thomas Elwood Lawrence | Morgan Co. |
| Harry J. Laws | Indiana State Bios |
| Thomas Laws | Vigo Co. |
| Abraham L. Lawshe | Miami Co. |
| J. F. Lawshe, M.D. | Howard Co. |
| Charles Lawson | Porter Co. |
| John H. Lawson | Blackford Co. |
| William A. Lawson | Decatur Co. |
| Charles M. Lawton | Wabash Co. |
| Clarence P. Laycock, D.C. | Marion Co. |
| William G. Laycock | Dearborn Co. |
| John G. Layer | Posey Co. |
| Jacob Layman | Tippecanoe Co. |
| Jacob Laymon | Shelby Co. |
| John W. Layne | Cass Co. |
| P. M. Layne | Montgomery Co. |
| Theodore McGinnis Layne | Putnam Co. |
| Harrison Layton | Cass Co. |
| Jephtha Layton | Decatur Co. |
| Willis Layton | Elkhart Co. |
| Albert R. Lazure | Blackford Co. |