John Jacob may refer to:
- John Jacob of Montferrat (1395–1445), Italian soldier & government administrator
- John Jacob (British army officer) (1812–1858)
- John J. Jacob (1829–1893), American politician
- Sir John Jacob, 1st Baronet
- John Edward Jacob (born 1934), American activist
- John Jacob Jingleheimer Schmidt, a traditional children's song.
Famous quotes containing the word jacob:
“I was not unemployed in my profession by the late John Jacob Astor; a name which, I admit, I love to repeat, for it hath a rounded and orbicular sound to it, and rings like unto bullion.”
—Herman Melville (1819–1891)