Lachlan Maclean may refer to
- Lachlan Lubanach Maclean of Duart (c.1350–c.1405) 5th Clan Chief of Clan Maclean
- Lachlan Bronneach Maclean (fl. 1470's) 7th Clan Chief of Clan Maclean
- Lachlan Og Maclean (c.1432–1484) 8th Clan Chief of Clan Maclean
- Lachlan Maclean, 10th Clan Chief of Clan Maclean (fl. 1510's)
- Lachlan Cattanach Maclean (c.1465–1523) 11th Clan Chief of Clan Maclean
- Sir Lachlan Mor Maclean (1558–1598) 14th Clan Chief of Clan Maclean
- Sir Lachlan Maclean, 1st Baronet (c.1620–1649) 17th Clan Chief of Clan Maclean
- Sir Lachlan Hector Charles Maclean, 12th Baronet (1942– ) 28th Clan Chief of Clan Maclean