| Last | First | Middle | Suffix | Desig | Company | City | State / Province |
Country |
| LaBar | Elizabeth | A. | ASLA | Las Vegas | NV | |||
| Lager | Anita | Toby | ASLA | Lager Raabe Skafte | Philadelphia | PA | ||
| Lai | Denise | State University of New York - Syracuse | Syracuse | NY | ||||
| Laidlaw | Jim | CSLA | IBI Group | Calgary | AB | Canada | ||
| Lajeunesse | Gerald | A.G. | ASLA, CSLA | National Capital Commission | Gloucester | ON | Canada | |
| LaJoie | Lisa | Micheline | University of Guelph | Guelph | ON | Canada | ||
| Lalli | Joseph | J. | FASLA | EDSA | Ft Lauderdale | FL | ||
| Lam | Hin Tat | Stantec Consulting Inc | Kitchener | ON | Canada | |||
| Lambert | Daniel | L. | Entranco Inc | Fort Collins | CO | |||
| Latka | Michael | J. | ASLA | Olathe | KS | |||
| Lavallee | Andrew | R. | ASLA | Matthew Nielsen LA PC | Pelham | NY | ||
| Lavoie | Caroline | Utah State University Dept of LAEP | Logan | UT | ||||
| Law | Alex | City of Orlando | Orlando | FL | ||||
| Law | Dennis | L. | FASLA | Kansas State University | Manhattan | KS | ||
| Lawliss | Lucy | A. | National Park Service | Decatur | GA | |||
| Layton | Timothy | SUNY College of Environmental Science & Forestry | Syracuse | NY | ||||
| Leamy | Kevin | C. | ASLA | Yamasaki Landscape Arch | Citrus Heights | CA | ||
| Leary | Donald | F. | ASLA | Land Design | Perrysburg | OH | ||
| Leasa | Jay | University of Guelph | Waterloo | ON | Canada | |||
| LeBlanc | Robert | CSLA | Ekistics Planning & Design | Dartmouth | NS | Canada | ||
| Leclerc | Sophie | Beaupre Associes | Laval | QC | Canada | |||
| Lederer | Donald | F. | FASLA | Fairfax | VA | |||
| Lee | Alan | Rutgers - the State University of New Jersey | New Brunswick | NJ | ||||
| Lee | Michael | S. | ASLA | Arvada | CO | |||
| Lee | Yong-Woo | ASLA | Wallace Roberts & Todd | Philadelphia | PA | |||
| Lefebvre | Daniel | M | CSLA | Montreal | QC | Canada | ||
| Lehmer | David | L. | ASLA | HWH Architects Engineers | Cleveland | OH | ||
| Leigh | W. Michael | ASLA | AIA Pittsburgh | Pittsburgh | PA | |||
| Leinster | David | ASLA, CSLA | Houg Woodland Naylor Dance Leinster | Toronto | ON | Canada | ||
| LePage | Sally | Wynn | CSLA | City of Mississauga | Mississauga | ON | Canada | |
| Lesch | Andrew | Minneapolis Park & Recreation Board | Minneapolis | MN | ||||
| Lesiuk | David | A. | ASLA | Canin Associates | Orlando | FL | ||
| Leslie | Don | Sear Brown | Salt Lake City | UT | ||||
| Leslie | Donald | W. | FASLA | Penn State University College of Arts & Architecture | University Park | PA | ||
| Levee | Arleyn | A | Levee Consulting | Belmont | MA | |||
| Levine | Stefanie | D. | City of Evanston | Evanston | IL | |||
| Lewis | Lisa | S. | Vandewalle & Associates | Madison | WI | |||
| Lewis | Phil | Jr. | FASLA | Phil Lewis Regional Design Studio | Madison | WI | ||
| Lewis | Robert | L. | Jr. | AJS Landscaping Design Inc | Houston | TX | ||
| Liebmann | Amy | C. | Rutgers - the State University of New Jersey | New Brunswick | NJ | |||
| Lin | Ling-Huei | SUNY College of Environmental Science & Forestry | Syracuse | NY | ||||
| Lindeburgh | Brad | P. | Stantec Consulting Inc | Calgary | AB | Canada | ||
| Linsemier | Leslie | C. | ASLA | Fitzgerald Henne & Associates | Lansing | MI | ||
| Little | J. Mack | FASLA | Little & Little | Raleigh | NC | |||
| Littleton | Cecilia | M. | Land Design | Grande Prairie | AB | Canada | ||
| Liu | Tsz-Ting | Rutgers - the State University of New Jersey | Princeton | NJ | ||||
| Livingston | Steven | D. | ASLA | City of Charleston Department of Parks | Charleston | SC | ||
| Lloyd | W. Bryce | ASLA | BCM | Kanab | UT | |||
| Lockwood | Paul | W. | ASLA | Barge Waggoner Sumner & Cannon Inc | Nashville | TN | ||
| Loganbill | J. Michael | VOA Associates Inc | Chicago | IL | ||||
| Long | Gregory | C. | Lessard Architectural Group | Chevy Chase | MD | |||
| Long | Margot | B. | ASLA, CSLA | Philips Wuori Long Inc | Vancouver | BC | Canada | |
| Longpre | Wendy | Wilmers | ASLA | City of East Lansing | East Lansing | MI | ||
| Lopez | Raymond | S. | ASLA | Glatting Jackson | Orlando | FL | ||
| Loschmann | Jonathan | A. | University of Guelph | Kanata | ON | Canada | ||
| Lovall | Sam | B. | ASLA | Hamilton Anderson Associates | Detroit | MI | ||
| Love | John | G. | II | ASLA | John G. Love & Associates PA | Johnson City | TN | |
| Lowe | Karen | S. | ASLA | St. Louis | MO | |||
| Ludwig | James | M. | RLA | ASLA | Ludwig & Associates Ltd | Farmington Hills | MI | |
| Lynch | Kathleen | M. | ASLA | Carol R. Johnson Associates | Boston | MA | ||
| Lyndes | Joy | E. | ASLA | Sage Landscape Architecture | Tucson | AZ | ||
| Lynes | Patty | M. | CSLA | Green Scheels Pidgeon | Kitchner | ON | Canada | |