Jernberg is a Swedish surname, Swedish ornamental surname literally meaning "iron mountain/hill"[1] Notable people with the surname include:
- August Jernberg (1826–1896), Swedish artist
- Ingemar Jernberg
- Michael Jernberg (born 1963), Swedish racing driver
- Olof Jernberg
- Sixten Jernberg (1929–2012), Swedish cross-country skier
- Sofia Jernberg (born 1983), Swedish opera singer