A HeLa cell , also Hela or hela cell, is a cell type in an immortal cell line used in scientific research. It is the oldest and most commonly used human cell line. The line was derived from cervical cancer cells taken on February 8, 1951 from Henrietta Lacks, a patient who died of her cancer on October 4, 1951. The cell line was found to be remarkably durable and prolific — which has led to it contaminating many other cell lines used in research.

Hela may refer to:

• Hela (people), a name for the Sinhala people of Sri Lanka
• Hela (caste), a Hindu caste found in North India
• Hela language
• HeLa, a line of cells derived from deceased American cancer patient Henrietta Lacks, notable for being the first immortalised cell line
• Hela Province, a new province being formed from 4 districts of Southern Highlands Province of Papua New Guinea
• Hela, the German name for Hel, Poland
• SMS Hela, light cruiser of the Imperial German Navy
• Hela (Blake), daughter of Tiriel in a poem by William Blake
• Hel (being), Queen of Hel and daughter of Loki in Norse mythology
• Hela (comics), Asgardian goddess from the Marvel Universe