Thornberry may refer to:
- People
- Robert Desmond Thornberry (1907–1969), Canadian politician
- Homer Thornberry (1909–1995), Texas politician (10th congressional district) and judge
- David Thornberry (1911–1995), bishop of Wyoming, United States
- Cedric Thornberry (1936–2014), Assistant-Secretary-General of the United Nations
- Mac Thornberry (born 1958), Texas politician (13th congressional district)
- Emily Thornberry (born 1960), British politician
- Michael Thornberry (born 1972), American handball player
- Nancy Thornberry, American chemist
- Jason Thornberry, American musician
- Terence Thornberry, American criminologist
- Other
- Thornberry, Texas, an unincorporated community
- Thornberry Animal Sanctuary, Yorkshire, England