The 99th Infantry Regiment (French - 99e régiment d'infanterie or 99e RI) was an infantry regiment of the French Army. It was formed in 1791 by renaming the Royal Deux-Ponts Regiment and fought in the French Revolutionary Wars before being merged into another unit in 1803. A new and unrelated 99th Infantry Regiment was formed in 1855 and took on the traditions of the previous regiment.