- Southern Terminus:
- Barnum Avenue (US 1) in Stratford
- Northern Terminus:
- Monroe Turnpike (CT 111) in Monroe
- 15.95 miles
CT 110 is a north/south route that runs through southeastern Fairfield County, along the Housatonic River. It begins at Barnum Avenue (US 1) in Stratford and runs north to Shelton, where it curves to the west. It runs west from Shelton to Monroe, where it ends at Monroe Turnpike (CT 111). The entire length is a two-lane undivided road, except for a short section just north of the Merritt Parkway (CT 15).