Dirr
Dirr may refer to:
- Michael Dirr, American horticulturist
- Dirr's Trees and Shrubs for Warm Climates, sometimes abbreviated Dirr or Dirr's; see List of horticulture and gardening books/publications
- Otillie Dirr, a founder of the Sisters of St. Francis of Assisi
- dirr, an abbreviation for dwarf irregular galaxy