The data presented in this report have been taken from a number of sources. Observations in Long Island Sound have been drawn from Riley and those for New York Bight from Ketchum, Redfield and Ayers. Winter values for Raritan Bay have been taken from Ayers, Ketchum and Redfield. Summer values for the same place are from unpublished data of Ayers. Data for the remainder of the area - the waters around Manhattan Id., the East and Harlem Rivers, and westernmost Long Island Sound have been gathered by Dr. John C. Ayers under the present contract. In addition to summer and winter data presented for the whole area under consideration, spring and fall data are presented for New York Bight. Besides the charts showing surface distribution of salinity a number of diagrams have been provided showing the vertical distribution at a number of selected sections.