Helena may refer to:

• Helena (given name), a given name (including a list of people and characters with the name)
• Katri Helena (born 1945), Finnish singer
• Helena, mother of Constantine I
• Saint Helena (disambiguation), this includes places

• Helena (island)

• Helena, Guyana

• Helena, Alabama
• Helena, Arkansas
  • Battle of Helena, July 4, 1863, during the American Civil War
• Helena, California
• Helena, Georgia
• Helena, Louisiana
• Helena Township, Michigan
• Helena, Huron County, Michigan
• Helena, Marquette County, Michigan
• Helena Township, Minnesota
• Helena, Mississippi
• Helena, Missouri
• Helena, Montana, the capital of Montana
  • Helena National Forest, Montana
  • Helena, Montana micropolitan area
  • Lake Helena, Montana
• Helena, New York
• Helena, Ohio
• Helena, Oklahoma
• Helena, South Carolina
• Helena, Texas
• Helena, Wisconsin

• Helena Island (Nunavut)
• Helena Lake, Saskatchewan
• Mount Helena (British Columbia)

• Helena River, Western Australia
• Mount Helena, Western Australia, a suburb

• Helena (1924 film), a silent German film directed by Manfred Noa
• Helena, a 2008 Colombian film
• Helena, a 2014 Argentine film

• Helena (Machado de Assis novel), 1876 novel by Machado de Assis
• Helena (Waugh novel), 1950 novel by Evelyn Waugh
• Helena (A Midsummer Night's Dream), a character from William Shakespeare's A Midsummer Night's Dream

• "Helena" (song), a 2004 song by American rock band My Chemical Romance
• "Helena" (Hugo Raspoet song), a 1970 song by Flemish singer Hugo Raspoet
• "Helena", a song by The Misfits from the 1999 album Famous Monsters
• "Helena", a song by Nickel Creek from the 2005 album Why Should the Fire Die?
• "Helena", a song by Will Haven from the 2007 album The Hierophant
• "Helena", a 1972 song by Jack de Nijs
• "Helena", a 1973 song by Leapy Lee
• "Helena", a 1963 instrumental by Ladi Geisler

• HMS Helena, name of various Royal Navy ships
• Helena, a packet boat, built in the United States in 1841
• USS Helena, name of various United States Navy ships
• USS Helena I (SP-24), United States Navy patrol boat

• Helena morpho or Morpho helena, a butterfly of the family Nymphalidae
• "Helena", theoretical founding ancestor of Haplogroup H
• "Helena", name used in ancient Greece for the phenomenon now referred to as St. Elmo's fire
• 101 Helena, main belt asteroid

• Helena (artwork), a 2000 art installation featuring goldfish in blenders
• HELENA, the Helmholtz Graduate School Environmental Health
• G-AAXF Helena, a named Handley Page H.P.42 airliner

• Elena (disambiguation)
• Eleni (disambiguation)
• Helen (disambiguation)
• Helene (disambiguation)
• Hellen