Bomber Command is an organisational military unit, generally subordinate to the air force of a country. The best known were in Britain and the United States. A Bomber Command is generally used for strategic bombing (although at times, e.g. during the Normandy Landings, may be used for tactical bombing), and is composed of bombers (i.e. planes used to bomb targets).

RAF Bomber Command was formed in 1936 to be responsible for all bombing activities of the RAF. It found especial fame during World War II, when its aircraft were used for devastating night-time air raids on Germany and occupied Europe, principally the former, their bombing raids causing tremendous destruction of urban areas and factories.

Much of its personnel was drawn from outside the United Kingdom, many coming from the British Empire. Under the British Commonwealth Air Training Plan, many Commonwealth countries contributed squadrons or individuals to British air and ground staff. For example, No. 6 Group, which represented about one-sixth of Bomber Command's strength, was a Royal Canadian Air Force unit. Some non-British personnel came from occupied European countries.

At its height, Bomber Command under Air Chief Marshal Sir Arthur "Bomber" Harris could put over 1,000 aircraft into the air over Germany. Over 12,000 Bomber Command aircraft were shot down during World War II, and 55,500 aircrew were killed, the highest attrition rate of any British unit.

Various aircraft were used, from the obsolete and horrendously vulnerable Fairey Battle in 1939 to the command's most numerous and successful aircraft, the Avro Lancaster. Bomber Command used British aircraft and American-built machines such as the Boeing B-17 Flying Fortress and Consolidated B-24 Liberator. Less than 2% of Bomber Command's wartime sorties were flown by US-built aircraft. UK lend-lease B-17s were the first to be put into battle and gave useful information on improvements before the US entered the war.

In 1968, RAF Bomber Command was merged into RAF Strike Command.

Whereas the Bomber Command in the RAF was a single organisation, reporting directly to the Chief of the Air Staff, there were many American Bomber Commands. They were subordinate formations, reporting in general to various numbered Air Forces around the world. Out of those organisations, four were tasked with strategic bombing of Germany and Japan. VIII Bomber Command, IX Bomber Command, XX Bomber Command and XXI Bomber Command.

VIII Bomber Command was the UK-based strategic bomber arm of the Eighth Air Force and contributed a substantial part of Operation Pointblank, the day-night bombing campaign by the RAF and USAAF to eliminate the Luftwaffe in preparation for the invasion of Europe. Two aircraft, the Boeing B-17 Flying Fortress, and the Consolidated B-24 Liberator, were the mainstays of this command. The B-17 was more highly regarded, but the Liberator had a greater range and a larger bomb load. VIII Bomber Command, known as "Pinetree", began strategic operations in Europe on 17 August 1942, with daylight missions on the precept that daylight attacks were more accurate than night attacks.