Thunberg or Tunberg is a Swedish surname. Notable people with the surname include:

• Anna Sofia Thunberg (1790–1871), Swedish opera singer
• Carl Peter Thunberg (1743–1828), Swedish naturalist
• Clas Thunberg (1893–1973), Finnish speed skater
• Greta Thunberg (born 2003), Swedish activist
• Lage Thunberg (1905–1977), Swedish Air Force general
• Olof Thunberg (born 1925), Swedish actor and director

• Trichloro-tert-butyl alcohol
• Trichlorotriazine
• Trichmech
• Tricho-
• Tricho
• Trichoadenoma
• Trichoadenoma of Nikolowski
• Trichoaleyrodes
• Trichoaspididae
• Trichoaspis
• Trichobaptria
• Trichobathra
• Trichoblastic fibroma
• Trichoblastoma
• Trichoblemma
• Trichobolus
• Trichoboscis
• Trichocarcinus walkeri
• Trichocentrum bicallosum
• Trichocentrum carthagenense
• Trichocentrum cavendishianum
• Trichocentrum cornucopiae
• Trichocentrum cornucopiae var. fuscatum
• Trichocentrum cosymbephorum
• Trichocentrum fuscum