From Ancestry.com Wiki
This entry was originally written by Alice Eichholz, Ph.D., CG, in Red Book: American State, County, and Town Sources.
Essential companions to place-name directories in Connecticut are the fine series of Beers atlases produced in the 1860s and 70s detailing structures, property owners, places of business, schools, cemeteries, and churches in each town. Bound in folio-sized books by county, many Connecticut libraries, in addition to the Connecticut State Library, have these excellent resources. The earlier 1852 Clark’s county maps are equally available at the same locations.
Present-day street maps by county are readily available in most large stationery stores.