CDPs are an overlooked component of the metropolitan region, and add to the understanding of the region as a whole. Large CDPs that remain unincorporated have other forms of governance, either public or private. CDPs are equivalent to incorporated places in many ways, but have distinctive differences based on state and region. Large CDPs have reasons for not incorporating. A subset of these CDPs that are similar to Boomburbs are examined. Implications for planners regarding CDP existence are discussed. / Master of Urban and Regional Planning