Port Arthur

Port Arthur may refer to: 

 Port Arthur naval base in Manchuria, now called Lüshunkou
 Port Arthur massacre (China) in the Sino-Japanese War in 1894
 Battle of Port Arthur, a sea battle in the Russo-Japanese War in 1904
 Siege of Port Arthur a land battle in 1904
Australia
 Port Arthur, Tasmania (Australia), the site of a historic convict settlement
 Port Arthur massacre (Australia), which occurred in Port Arthur, Tasmania in 1996
United States
 Port Arthur, Texas, a city in the United States
 Port Arthur, Wisconsin, an unincorporated community
Canada
 Port Arthur, Ontario (Canada), a former city, now a part of Thunder Bay
 Port Arthur (electoral district) (Canada), 
Finland
 VIII District, Turku (Finland), aka Port Arthur, a district in Turku

Other
  Port Arthur, BattleTech Universe's fictional planet