Lachlan (or Lauchlan) Mackinnon (or MacKinnon or McKinnon) may refer to: Sir Lachlan Mackinnon (clan chief) (died c.1634), chief of the Scottish Highland clan Mackinnon Lauchlan Bellingham Mackinnon (1814–1877), Member of Parliament for Rye, Sussex, England Lauchlan Mackinnon (1817–1888), Australian pastoralist, politician and newspaper proprietor Lauchlan K. S. Mackinnon (1861–1935), Australian racing official, namesake of LKS MacKinnon Stakes Lachlan Donald Ian Mackinnon (1882–1948), Royal Navy officer Lachlan Mackinnon (born 1956), Scottish poet, critic and literary journalist