LL may refer to:
- Ll or ll, a digraph that occurs in several natural languages
Arts and entertainment
- The Evil of the Daleks, a Doctor Who episode (production code: LL)
- Labyrinth Lord, a fantasy role-playing game
- Abbreviation for Love Live!, a music-oriented media mix project
- LL, the production code for the 1967 Doctor Who serial The Evil of the Daleks
Brands, companies, and organizations
- Trade mark of the 1864 in Paris founded firm Léon & Lévy specialized in stereoscopic views and postcards
- Lincoln Laboratory, a US federally funded research and development center
- La Línea, a criminal organization based in Ciudad Juárez, Mexico
- Lumber Liquidators, a US retailer of hardwood flooring
- Bayer's Liberty Link gene, found in many modern food crops
Computing
- ll, a command to list files in long format in many Unix and Unix-like operating systems, as an alternative to ls -l
- LL parser, in computer science
Places
- LL, the ICAO prefix for airports in Israel
- LL postcode area, UK, also known as the Llandudno postcode area, covering north Wales
- Liberland, a micronation on the western bank of the Danube river, between Croatia and Serbia
- Miami Air International, an airline (IATA code: LL)
Other uses
- 'll, meaning will or shall in contractions
- L (New York City Subway service), formerly designated LL
- Liquid Limit, in geotechnical engineering
- "Extra large", a clothing size typically abbreviated "XL"
- Late Latin, the written Latin of Late Antiquity
- Nintendo DSi LL, the Japanese name for the Nintendo DSi XL
- Nintendo 3DS LL, the Japanese name for the Nintendo 3DS XL
- New Nintendo 3DS LL, the Japanese name for the New Nintendo 3DS XL
- New Nintendo 2DS LL, the Japanese name for the New Nintendo 2DS XL