The following websites have historic Connecticut maps:
The Connecticut State Library, Connecticut Historical Society, Yale University, and Wesleyan University have major map collections.
The Family History Library has 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 film 1377700; Hartford —fiche 6016650-54, New Haven —6016688-94).
Printable maps are also available from the National Atlas of the United States -- http://nationalatlas.gov/printable.html