 It includes St. Paul's Episcopal Church and the First Congregational Church, both of which face the green.The district contains 54 contributing buildings, 3 contributing sites (the Green, Mill Hill Historic Park, and St. Paul's Place), and 1 other contributing object (World War I memorial on the Green), most of which were designed in the 18th and 19th centuries.The district is irregular in shape, drawn to include historic properties in the vicinity of the Norwalk Green, but to exclude non-historic properties.