From the Census Department:
he U.S. population grew by 0.6 percent and Nevada and Idaho were the nation’s fastest-growing states between July 1, 2017, and July 1, 2018. Both states’ populations increased by about 2.1 percent in the last year alone. Following Nevada and Idaho for the largest percentage increases in population were Utah (1.9 percent), Arizona (1.7 percent), and Florida and Washington (1.5 percent each).
Washington, D.C., reached a population of 702,455 in July 2018, surpassing 700,000 for the first time since 1975, according to the U.S. Census Bureau’s national and state population estimates released today. The change is due primarily to an influx of people from other parts of the country that began early in the decade. While the increase has begun to slow, the District of Columbia still grew by almost 1 percent last year.
Population declines were also common, with losses occurring in nine states and Puerto Rico. The nine states that lost population last year were New York (down 48,510), Illinois (45,116), West Virginia (11,216), Louisiana (10,840), Hawaii (3,712), Mississippi (3,133), Alaska (2,348), Connecticut (1,215) and Wyoming (1,197).