Cleantech researchers, entrepreneurs, investors, corporate executives, and policy-makers across New England are driving economic growth, stimulating creation of new jobs and businesses, and protecting the environment by enabling development of new and innovative clean technologies. A series of recent studies have characterized the economic importance of cleantech at the state level, but there has not been a regional analysis of the cleantech innovation cluster in New England. New England’s Cleantech Innovation Landscape is the first New England-wide study of the cleantech innovation cluster. It establishes a foundation for measuring the progress of cleantech innovation, providing a snapshot of companies and supporting organizations active in cleantech R&D and commercialization activities. It establishes benchmarks by which to gauge success of the regional cluster and also identifies areas where the region is – or could be – a leader in cleantech innovation.