Marc Antoine Timeroy (22 August 1793, La Frette, Isère – 13 November 1856, Lyon) was a French botanist.
A bookkeeper by trade, he was educated in botany by a Lyon pharmacist named Thevenin.
From 1846 until his death he was a member of the Société linnéenne de Lyon, from which he served as a botanical curator in 1852–55.
After his death, his biography was composed by Étienne Mulsant ("Notice sur Marc-Antoine Timeroy", F. Dumoulin 1859).
[1] In 1860 the genus Timeroyea (syn: Pisonia) was named after him by Jean Xavier Hyacinthe Montrouzier.