Lain is an uncommon female name in English. Some people named Lain include:
- Douglas Lain, a science-fiction author.
- Saint Latuinus, also known as Saint Lain, bishop of Sées.
It could also refer to:
- Lain (commune), a Commune in the French Yonne département.
- Laining, a synonym for Torah reading.
- Serial Experiments Lain, an anime series.
