The First Battle of Kiev was the German name for the major battle that resulted in an encirclement of Soviet troops in the vicinity of Kiev during World War II, the capital and most populous city of the Ukrainian Soviet Socialist Republic. This encirclement is the largest encirclement in the history of warfare by number of troops. The battle occurred from 7 July to 26 September 1941 as part of Operation Barbarossa, the Axis invasion of the Soviet Union.

Encirclement is a military term for the situation when a force or target is isolated and surrounded by enemy forces. The situation is highly dangerous for the encircled force. At the strategic level, it cannot receive supplies or reinforcements, and on the tactical level, the units in the force can be subject to an attack from several sides. Lastly, since the force cannot retreat, unless it is relieved or can break out, it must fight to the death or surrender.