Community Statistical Areas (CSAs) are clusters of neighborhoods and are organized around U.S. Census tract boundaries by the Baltimore Neighborhood Indicators Alliance. In some cases, CSA boundaries may cross neighborhood boundaries. There are 55 CSAs in Baltimore City. Neighborhood lines often do not fall along CSA boundaries. The CSAs were originally created in 2002 and were revised for the publication of Vital Signs 10 using new 2010 Census Tract boundaries. There are no anticipated boundary revisions in 2020.