- Southern Terminus:
- North Avenue (US 1) in Norwalk
- Northern Terminus:
- North Street (CT 37), Main Street (CT 39), and Downs Street (SR 841) in Danbury
- 23.57 miles
CT 53 is a north/south route extending from Norwalk to Danbury. It runs parallel to and a few miles east of US 7. It mostly passes through rural surroundings. CT 53 is a two-lane undivided road, except for the northernmost section of about half a mile along Main Street in Danbury, where it widens to four lanes and has a grass median.