Photos of the Long Island Sound

Research & Monitoring


The Long Island Sound Study has launched a new version of the Environmental Indicators section. The data below may be out of date. Please visit and bookmark the new section here to see the most recent data.

Status and Trends: LISS Environmental Indicators

Population Within 50-mile Buffer of Long Island Sound

Emily Wilson, UConn CLEAR

Emily Wilson, UConn CLEAR


Population Within a 50-Mile Buffer of Long Island Sound
  NY CT MA NJ RI Total
2000 12,682,620 3,390,192 395,531 5,479,183 1,048,319 22,995,845
2010 13,020,854 3,555,178 399,094 5,787,357 1,052,567 23,815,050



Densely populated areas near the coast can put stress on coastal bodies of water such as Long Island Sound. This indicator recognizes that pollution discharges into the Sound from sources such as stormwater runoff, wastewater treatment plants, and air deposits ultimately comes from humans. The indicator tracks people who live within a one hour drive of the Sound, including those who live just outside the watershed boundaries but might commute back and forth into the watershed. The indicator also  shows  the millions  of people who are close by the Sound to  appreciate its resources with activities such as fishing, boating, and swimming.


The population within the 50-mile radius is 23,815,050, an increase of about 700,000 people from 2000 to 2010. The 3.13 percent increase is comparable to the population increase of 3.2 percent for the entire northeast. Overall, the US population increased by 9.7 percent to 308.7 million people with the majority of the increase occurring in the south and west. The Long Island Sound region remains one of the most densely populated areas in the US. About 7.5 percent  (23.3 million people) of the US population lives within the 50-mile radius.

Data Note

The population within a 50-mile radius is estimated using US Census Bureau census tracts lying within 50 miles of Long Island Sound (see the map under the data table button).

Show/Hide Table


2010 U.S. Census tracts within a 50-mile radius of Long Island Sound..

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