HU or Hu may refer to:
Hungary (; Hungarian: Magyarország [ˈmɒɟɒrorsaːɡ]) is a unitary parliamentary republic in Central Europe.
Modern humans (Homo sapiens, primarily ssp. Homo sapiens sapiens) are the only extant members of the subtribe Hominina, a branch of the tribe Hominini belonging to the family of great apes.
Human papillomavirus infection is an infection by human papillomavirus (HPV). Most HPV infections cause no symptoms and resolve spontaneously.
Huntington's disease (HD), also known as Huntington's chorea, is an inherited disorder that results in death of brain cells.
Hurricane Katrina was an extremely destructive storm that hit the Gulf Coast of the United States in August 2005. It was the costliest natural disaster and one of the five deadliest hurricanes in the history of the United States.