Derby is a city of about 5.4 square miles in New Haven County, Connecticut, and the smallest city in the state by area. It was settled in 1642 as the Paugasset trading post, named Derby in 1675, and sits where the Naugatuck and Housatonic rivers meet. Sections include Downtown/Birmingham, East Derby, West Derby and Derby Neck.
Source: Redfin, June 2026, ZIP 06418. Market figures change every month; for a home-specific analysis, contact Matt.
Matt Nuzie of REMAX Right Choice was the #1 REMAX agent in Connecticut every year from 2017 through 2025, with more than 900 homes sold across Fairfield and New Haven Counties. Browse current Derby listings below, or call or text Matt at (203) 913-3698 for a free market analysis of your home.