20th Century Timeline
- 1913 - The cities of Norwalk, South Norwalk , the East Norwalk Fire District, and the remaining parts of the surrounding Town of Norwalk consolidated into the present day City of Norwalk.
- May 19, 1921 - Norwalk split into six taxing districts and Rowayton is formally annexed.
- October 14-17, 1955 - Norwalk's downtown area was devastated by a tropical storm which caused the Norwalk River to severely flood.
- 1988 Maritime Aquarium at Norwalk founded.