New Census Data Reveal Modest Population Growth in New Hampshire Over the Past Decade

In this fact sheet, author Kenneth Johnson reports that New Hampshire’s population reached 1,377,529 on April 1, 2020, an increase of 61,000 residents (4.6 percent) since April 1, 2010 according to new 2020 Census data. This increase is smaller than the state’s population gain of 6.5 percent between 2000 and 2010. New Hampshire’s population grew both because more migrants moved to the state than left and because births exceeded deaths. Migration was the most important source of the state’s population increase, accounting for 89 percent of the population gain. Over the decade, New Hampshire had a net migration gain of 54,500 including both those who moved from other states and immigrants. In contrast, there were just 6,500 more births than deaths during the decade, far fewer than in prior decades