Norwalk is located at 41°7'2" North, 73°24'29" West (41.117500, -73.408056).
According to the United States Census Bureau, the city has a total area of 36.33 mi2 (94.10 km2). 22.81 mi2 (59.07 km2) of it is land and 13.53 mi2 (35.03 km2) of it is covered by water. The total area is 37.23% water.
Norwalk is located in the Eastern Standard Time (EST) timezone, GMT-05:00. It observes Daylight Saving Time (DST).