| 1 | John | Yossarian | A pilot captain. Protagonist. |
| | Nurse | Duckett | One of the ward nurses who didn't like Yossarian. |
| | Dunbar | | An airman. Yossarian's friend. |
| | Texan | | Yossarian's co-patient. |
| | Nurse | Cramer | Nurse Duckett's best friend. |
| | Soldier in | White | Yossarian's fully bandaged co-patient. |
| | Lt. | Nately | Yossarian and Chaplain's common friend. |
| 2 | C.I.D | Man | One of Yossrian's co-patients. The investigator of Yossarian's excessive censoring. |
| | Clevinger | | Yossarian's colleague. |
| | Orr | | Yossarian's roommate. A bomber pilot. |
| | Havermeyer | | Yossarian's colleague and the best bombardier. |
| | McWatt | | Clevinger's former roommate. A pilot. |
| | Appleby | | One of the officers who was good at everything. |
| | Chuck | Cathcart | Major Major's executive officer. |
| | Dan | Daneeka | The flight surgeon. Yossarian's friend. |
| | Snowden | | The radio gunner. Deceased. |
| 3 | Major Major | | The squadron commander. Aka: Caleb Major. |
| | Hungry | Joe | One of Yossarian's colleagues. A crazy officer. |
| | P.P | Peckem | The general who desperately wants to take over General Dreele's position. |
| | Nately's | Whore | The whore in Rome Nately falls in love with. |
| | Dreedle | | The commander of the U.S. Army Air Corps in Pianosa. |
| | Wintergreen | | The clerk at 27th air force. |
| | Sgt. | Towser | Major Major's assistant. |
| | Colonel | Cargill | General Peckem's troubleshooter. |
| | Knight | | The turret gunner in Yossarian's plane. |
| | Aardvaark | | Yossarian's plump, pipe-smoking navigator. |
| | Milo | MinderBinder | The mess officer who bombed the squadron. |
| 4 | Lt. Col | Korn | Cathcart's Lt. Colonel and right-hand man. |
| | Colonel | Moodus | General Dreedle's son-in-law. |
| | Gus | | Doc Daneeka's orderlies. |
| | Wes | | Doc Daneeka's orderlies. |
| 5 | White | Halfoat | Captain Black's assistant. Doc Daneeka's housemate. |
| | Captain | Black | Halfoat's captain. |
| | Dobbs | | Yossarian's associate who went crazy in mid air. |
| | Major | Danby | The fidgeting group of operations officer. |
| 6 | Huple | | Hungry Joe's roommate. A pilot. |
| | Colonel | Nevers | The colonel who got killed. |
| | Captain | Flume | The squadron's public relations officer. |
| | Major | Duluth | The former squadron commander. Deceased. |
| | Kraft | | The man who was killed at the bombing. |
| 7 | Corporal | Snark | The boy who poisoned the squadron. |
| 8 | Scheisskopf | | A training unit commander for Yossarain and Clevinger. |
| | Dori | Duz | Scheisskopf's wife's friend. The girl that Yossarian loves. |
| | Lt. | Travels | Scheisskopf's colleague. |
| | Lt. | Engle | Scheisskopf's colleague. |
| | Major | Metcalf | One of the judges in Clevinger's trial. |
| | Popinjay | | The clerk. |
| 9 | R.O | Shipman | The group chaplain. Yossarian's friend. |
| 10 | Lt. | Coombs | The former assistant
intelligence officer. |
| | Dr. | Stubbs | The doctor in Dunbar's squadron. |
| | Captain | Plitchard | The captain-in-charge of squadrons. |
| | Captain | Wren | Captain Plitchard's colleague. |
| | Lt. | Mudd | The dead man in Yossarian's tent. |
| 11 | Corporal | Kolodny | Captain Black's assistant. Doc Daneeka's housemate. |
| 12 | Kid | Sampson | The under aged soldier. |
| 13 | Luciana | | Yossarian's lover. |
| | Michaela | | The maid of Yossarian's squad in Rome. |
| | Maid in | Lime-colored Panties | The maid who falls in love with Yossarian. |
| 20 | Corporal | Whitcomb | R.O. Shipman's assistant. |
| 22 | Sammy | | The tailgunner on Yossarian's bomber. |
| 27 | Major | Sanderson | The neurotic psychiatrist. |
| 29 | Mrs. | Scheisskopf | Scheisskopf's wife. |
| 31 | Mrs. | Daneeka | Doc Daneeka's wife. |
