[Excerpt] Today, the Census Bureau began releasing local-level Connecticut data from the 2010 Census. You may refer to the DataHaven Knowledge Center for a file showing the population growth in Connecticut's counties and largest cities. DataHaven also has a number of resources related to the 2010 Census, including more documents and interactive map-based visualizations, on this page (a newer web browser may be required to see the maps). Visualizations by race and ethnic group for Connecticut Census data can be seen here.

New Haven's population increased by 5.0% between 2000 and 2010, a rate higher than that of the State of Connecticut, and higher than that of the state's five largest cities, including Stamford. In terms of overall numbers, New Haven added 6,153 persons, more than any other town or city within the State of Connecticut.
Additional information, and data visualizations, will be posted at DataHaven as they are released by the Census Bureau over the coming hours. DataHaven encourages organizations, agencies and citizens located within the Greater New Haven and Valley Region to contact them if they need assistance with using 2010 or other recent data from the Census Bureau.
Like the State of Connecticut and the nation as a whole, New Haven's growth was heavily the result of a large increase in the population of Hispanic/Latino origin - now representing 27% of the city's population, up from 21% in 2000. The New Haven Independent reports on the demographic changes in an article posted here.