Until the 1870s, the center of Noroton, around where Noroton Avenue meets the Boston Post Road, was considered the commercial center of Darien and the area north of Interstate 95 that is now considered Noroton Heights was called Noroton.

The current center of town, where the railroad tracks cross the Boston Post Road, was called Darien Depot. But when the Town Hall was established there, that area became Darien and Noroton was adopted by the old commercial center.

The name Noroton Heights was used after a post office with that name was established there.