The following websites have historic Connecticut maps:
The Connecticut State Library, Connecticut Historical Society, Yale University, and Wesleyan University have major map collections.
United States Census Bureau State and County Map. This map will allow you to zoom in on any state or county in the United States and read the names of all of the neighboring counties.
Connecticut maps for 1790, 1810, 1823, 1838, 1850, 1862, 1878, 1884 and 1917. The library also has Hartford and New Haven city ward maps dating from 1850 to 1899 FHL Collection 1377700; Hartford FHL Collection fiches 6016650-54, New Haven FHL Collection fiches 6016688-94.
Printable maps are also available from the National Atlas of the United States -- http://nationalatlas.gov/printable.html