Loudon's Hortus Britannicus
- Title: Loudon's Hortus Britannicus
- Abbreviation: Hort. Brit. (Loudon))
- Name: Loudon's Hortus Britannicus: a catalogue of all the plants indigenous, cultivated in, or introduced to Britain. Part I. The Linnaean arrangement: Part II. The Jussieuean arrangement / edited by J. C. Loudon.
- Author: John Claudius Loudon
- Publication: 1830
- City: London