The 1940–49 Pacific typhoon seasons featured the 1941–44 Pacific typhoon seasons, Typhoon Cobra and others. The seasons had no official bounds, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.

The typhoon seasons listed here are limited to typhoons the Pacific Ocean, north of the equator and west of the international date line. Storms that form east of the date line and north of the equator are called hurricanes: see 1940–1948 Pacific hurricane seasons. Tropical storms formed in the entire west pacific basin were assigned a name by the Joint Typhoon Warning Center.

The 1940–49 Pacific typhoon seasons include: