Various floods occurred in 1955:
- 1955 Hunter Valley floods in New South Wales, Australia
- 1955 Connecticut floods in the United States
- Floods caused by cyclones in the:
- 1955 Atlantic hurricane season (eastern Americas)
- 1955 Pacific hurricane season (western American)
- 1955 Pacific typhoon season (eastern Asia)
- 1950s South Pacific cyclone seasons
- 1950s Australian region cyclone seasons