| Country | Units | Operator |
| Argentina | 2 | Argentinian Air Force has 1 737-500 and 1 737-700NG |
| Australia | 8 | Royal Australian Air Force uses two 737-700 BBJ VIP transports as well as six 737 AEW&C Wedgetails. |
| Chile | 2 | Chilean Air Force has 1 737-300, and 1 737-500. |
| Colombia | 2 | Colombian Aerospace Force has 1 737- 700 |
| India | 18 | Indian Air Force operates three 737-200, and three 737-700 BBJ aircraft and Indian Navy operates 12 P-8I |
| Indonesia | 11 | Indonesian Air Force operates three 737-2X9 Surveiller MPA, one 737-200Adv, three 737-400, one 737-500, 2 737-800NG and one 737-800 aircraft. |
| Kazakhstan | 1 | Armed Forces of the Republic of Kazakhstan operates a single 737-700 BBJ |
| Mexico | 2 | Mexican Air Force has one 737-200Adv, and one 737-300F. |
| Peru | 4 | Peruvian Air Force has three 737-200, one 737-500 aircraft. |
| Poland | 3 | Polish Air Force has one 737-800 and two 737 BBJ2s. |
| Saudi Arabia | 3 | Royal Saudi Air Force has two 737-700 BBJ, and one 737-800 aircraft. |
| South Africa | 1 | South African Air Force have 1 737-700WL BBJ. |
| South Korea | 5 | Republic of Korea Air Force uses four 737 AEW&C Peaceeye, one 737-300 jet |
| Taiwan | 1 | Taiwanese Air Force operates one 737-800. |
| Thailand | 4 | Royal Thai Air Force for Thai Royal Family. One 737-2Z6 ), two 737-4Z6 ), and one 737-8Z6 ). The RTAF has also operated the 737-3Z6 under the designation B.L.11A. |
| Turkey | 4 | Turkish Air Force uses four Boeing 737-700IGW jets |
| United Kingdom | 9 | Royal Air Force uses 9 Poseidon MRA1. |
| United States | 19 | United States Air Force uses 10 Boeing C-40 Clipper transports, and United States Navy uses nine C-40As. |
| Venezuela | 1 | Venezuelan Air Force operates 1 737- 200 |