Cornelius (fem. Cornelia) was the nomen of the patrician gens Cornelia, one of the important families of ancient Rome. The Scipiones, Dolabellae, and Cinnae were notable branches of the family. For the women of the Cornelii, see Cornelia.

• Ser. Cornelius Maluginensis (Cossus), consul 485 BC
• L. Cornelius Ser.f. Maluginensis Uritus (Cossus), consul 459 BC
• M. Cornelius Maluginensis, decemvir 450 BC
• M. Cornelius Maluginensis, consul 436 BC
• Aulus Cornelius Cossus, consul 428 BC
• P. Cornelius Cossus, consular tribune 415 BC
• Aulus Marcus Cornelius Cossus, consular tribune 413 BC
• Cn. Cornelius A.f. Cossus, consul 409 BC
• P.? (or Ser.) Cornelius Maluginensis, consul 393 BC and later(?)
• L. Cornelius P.f. Scipio, consul 350 BC
• A. Cornelius P.f. Cossus Arvina, consul 343 BC, 332 BC
• P. Cornelius Scapula, consul 326 BC
• L. Cornelius Lentulus, consul 326 BC?
• P. Cornelius A.f. Arvina, consul 306 BC, 288 BC
• Servius Cornelius Cn.f. Lentulus, consul 303 BC
• Lucius Cornelius Scipio Barbatus, consul 298 BC
• P. Cornelius Cn.f. Rufinus, consul 290 BC
• P. Cornelius Dolabella, consul 283 BC
• P. Cornelius Cn.f. Rufinus, consul 277 BC (II?)
• Cornelius Ti.f Lentulus Caudinus, consul 275 BC
• Ser. Cornelius P.f. Merenda, 274 BC
• Cn. Cornelius P.f. Blasio, 270 BC, 257 BC
• Gnaeus Cornelius Scipio Asina, consul 260 BC, 254 BC
• Lucius Cornelius Scipio, consul 259 BC
• L. Cornelius L.f. Lentulus Caudinus, consul 237 BC
• P. Cornelius L.f. Lentulus Caudinus, consul 236 BC
• Gnaeus Cornelius Scipio Calvus, consul 222 BC
• P. Cornelius Cn.f. Scipio Asina, consul 221 BC
• Publius Cornelius Scipio, consul 218 BC
• Publius Cornelius Scipio Africanus Major, famous general
• M. Cornelius M.f. Cethegus, consul 204 BC
• Cn. Cornelius L.f. Lentulus, consul 201 BC
• Lucius Cornelius Lentulus, consul 199 BC
• C. Cornelius L.f. Cethegus, consul 197 BC
• L. Cornelius L.f. Merula, consul 193 BC
• Publius Cornelius Scipio Nasica, consul 191 BC
• Lucius Cornelius Scipio Asiaticus, consul 190 BC
• Publius Cornelius Scipio Africanus Minor, son of Major
• P. Cornelius L.f. Cethegus, consul 181 BC
• Cn. Cornelius Cn.f. Scipio Hispallus, consul 176 BC
• Lucius Cornelius Scipio, praetor 174 BC
• Publius Cornelius Scipio Nasica Corculum, consul 162 BC, 155 BC
• M. Cornelius Cethegus, consul 160 BC
• Cn. Cornelius Dolabella, consul 159 BC
• L. Cornelius Lentulus Lupus, consul 156 BC
• Publius Cornelius Scipio Aemilianus Africanus Numantinus (Scipio the Younger)
• Publius Cornelius Scipio Nasica Serapio, consul 138 BC
• Lucius Cornelius Cinna, consul 87 BC
• Gnaeus Cornelius Dollabella, consul 81 BC
• Lucius Cornelius Sulla Felix (Sulla), dictator ca 81 BC
• Gnaeus Cornelius Dolabella, praetor 81 BC, proconsul 80 BC
• Gaius Cornelius, quaestor for Pompey, tribune 67 BC
• Publius Cornelius Dolabella, consul 44 BC
• Lucius Cornelius Cinna, praetor 44 BC
• Gnaeus Cornelius Lentulus, consul 18 BC
• Publius Cornelius Lentulus Marcellinus, consul 18 BC
• Publius Cornelius Scipio, consul 16 BC
• Gnaeus Cornelius Lentulus the Augur, consul 14 BC
• Lucius Cornelius Sulla, consul 5 BC
• Lucius Cornelius Lentulus, consul 3 BC
• Cossus Cornelius Lentulus, consul 1 BC
• Gnaeus Cornelius Cinna Magnus, consul AD 5
• Publius Cornelius Dolabella, consul 10
• Cornelius Severus, poet during Augustus Caesar
• Servius Cornelius Cethegus, consul 24
• Cossus Cornelius Lentulus, consul 25
• Gnaeus Cornelius Lentulus Gaetulicus, consul 26
• Lucius Cornelius Sulla Felix, consul 33
• Servius Cornelius Salvidienus Orfitus, consul 51
• Faustus Cornelius Sulla Felix, consul 52
• Publius Cornelius Scipio, consul 52
• Cossus Cornelius Lentulus, consul 60
• Gaius Cornelius Tacitus, historian
• Servius Cornelius Dolabella Petronianus, consul 86
• Aulus Cornelius Palma Frontonianus, consul 99, 109
• Marcus Cornelius Fronto, grammarian 2nd century
• Ser. Cornelius Sciio Saluidienus Orfitus, consul 110
• Cornelius Pansa, consul 122
• L. Octauius Cornelius P. Slauius Iulianus Aemilianus, consul 148
• Ser. Cornelius Scipio L. Saluidienus Orfitus, consul 149
• M'. Acilius Glabrio Cn. Cornelius Severus, consul 152
• Marcus Gavius Cornelius Cethegus, consul 170
• Ser. Cornelius Scipio Saluidienus Orfitus, consul 178

• Cornelius Labeo, wrote a history of Roman/Etruscan religion, now lost

Pope Cornelius was pope from 251 to 253.

The Roman centurion Cornelius is considered by Christians to be the first Gentile convert to the faith, as related in Acts 10.

Cornelius is a Japanese producer and recording artist.