- Sep 4 Cullen Whipple, American inventor (pointed screw machine), born in Providence, Rhode Island (d. 1868)
- Sep 10 Marie Laveau, American Voodoo practitioner, born in French Quarter, New Orleans, Louisiana (d. 1881)
- Sep 12 Giuseppe Concone, Italian singing teacher, born in Turin, Italy (d. 1861)
- Sep 17 Edward William Lane, British lexicographer and translator (One Thousand & One Nights), born in Hereford, England (d. 1876)
- Sep 24 Mikhail Ostrogradsky, Russian physicist and mathematician, born in Poltava Governorate, Russian Empire (d. 1862)