Culture or time period
- Lillooet6
- Lima culture (100-650 AD)2
- Liveheres4
- Lobensels facies18
- Lobi10
- Lobi cluster10
- Lokono (Arawak)132
- Loma151
- Lome2
- Lotela1
- Lower Chinook1
- Lower Colorado River tribes251
- Lower Columbia River cultures90
- Lower Emergent Period of California (1000–1500 AD)204
- Lower Klamath River Tribes2
- Lower Lake Pomo25
- Lower Mousterian14
- Lower Paleolithic (3.3 million–300,000 BC)4
- Lower Umpqua1
- Lower Yukon River Eskimo26