The Connecticut State Data Center projects the Greenwich 2015 population as 60,471 people and the 2020 population as 59,372. If we assume that the population changes linearly between 2015 and 2020, then the Greenwich 2017 population would be 60,031. Note: this value is a projection, not a count.
The 2010 Decennial Census provides the most recent count of the Greenwich population as 61,171 people. And the US Census Bureau’s 2016 Population Estimates Program provides a population estimate for Greenwich as 62,359 people.
The graph is a visualization of the best Greenwich population data available from different data sources. The figures below come from different data sources that use different methodologies. Thus additional research would be required before comparing these data.