Jean Chacornac (June 21, 1823 – September 23, 1873) was a French astronomer.

Working in Marseille and Paris, he discovered six asteroids. The asteroid 1622 Chacornac and the Chacornac crater on the Moon are named in his honour.

Asteroids discovered: 6

25 Phocaea	April 6 1853
33 Polyhymnia	October 28 1854
34 Circe	April 6 1855
38 Leda	January 12 1856
39 Laetitia	February 8 1856
59 Elpis	September 12 1860