This document provides an overview of the history and development of Community Supported Agriculture (CSA) in the United States. It discusses how the CSA model originated in the 1960s in Europe and was brought to the US in the 1980s. Two main CSA models have emerged: shareholder CSAs, which are consumer-driven, and subscription CSAs, which are farmer-driven. The document also outlines trends in the CSA movement, including the growth of different CSA variations and the increasing percentage of CSAs operated by individual farmers. It provides statistics on the number of CSAs in the US and profiles some examples of non-profit and cooperative CSAs.