National Register of Historical Places - Windsor County: Provides a listing of properties, districts, lodgings and landmarks in the county. Includes architectural style and period of historical significance.
Southern Windsor County Regional Planning Commission (SWCRPC): Serving the ten member towns of Andover, Baltimore, Cavendish, Chester, Ludlow, Reading, Springfield, Weathersfield, West Windsor, and Windsor to address local, regional, and state opportunities and concerns.
Windsor County QuickFacts from the US Census Bureau: Table of statistics with county comparison to state numbers.