| 1990-015A | LACE |
| viz. | Lacrosse |
| 1976-039A | Lageos 1 |
| 1992-070B | Lageos 2 |
| 1963-035B | LAMPO |
| 1963-035A | Lampo |
| viz. | Landsat |
| 2010-066H | LANL CubeSat 0 |
| 2010-066E | LANL CubeSat A |
| 2010-066G | LANL CubeSat B |
| 2010-066D | LANL CubeSat C |
| 1963-016A | Lanyard 2 |
| 1963-032A | Lanyard 3 |
| 2006-001B | LAPAN-Tubsat |
| 2003-042B | Larec |
| 1971-056A | LASP-1 |
| viz. | LatinSat |
| 2009-031B | LCROSS |
| viz. | LCS |
| 1984-034B | LDEF |
| 2000-081C | LDREX |
| 2006-043C | LDREX-2 |
| viz. | Leasat |
| 2000-010A | Leonardo F-1 |
| 2001-035A | Leonardo F-2 |
| viz. | LES |
| 1997-044A | Lewis |
| 2007-012N | Libertad 1 |
| 1991-080B | Liberty |
| 1983-008B | LIPS-2 |
| 1994-059A | LITE-1 |
| 1999-053A | LMI-1 |
| 2005-041A | LM-RPS 1 |
| 2005-036A | LM-RPS 2 |
| 1996-036A | LMS-1 |
| 1968-059B | LOADS-1 |
| 1971-067C | LOADS-2 |
| 1963-021B | Lofti 2A |
| 1967-050B | LOGACS |
| 1991-047B | Losat-X |
| 2000-004M | Louise |
| 2001-038A | LRE |
| 2009-031A | LRO |
| 1968-025B | LTA-2R |
| 1967-113B | LTA-10 |
| viz. | Luč |
| viz. | Luna |
| viz. | Lunar Orbiter |
| 1998-001A | Lunar Prospector |
| 1970-095A | Lunochod 1 |
| 1973-001A | Lunochod 2 |
| 1990-005G | LUsat |