Eight states, North Carolina, Mississippi, Louisiana, Hawaii, Alaska, Illinois, West Virginia and Wyoming had negative growth, or the number of people being born and moving in is less than the number dying and moving out.
By comparison, Missouri's population stands at 6.1 million, an increase of 124,607 people since 2010.
Illinois' population fell by 33,703 people to just over 12.8 million, according to the estimates.
Idaho at 2.2 percent was number one, followed by Nevada at 2 percent.
Rogers said there's still work to do if Idaho wants to top the Census Bureau's list next year.
The top 10 most populous states, in order, are: California, Texas, Florida, New York, Pennsylvania, Illinois, Ohio, Georgia, North Carolina and MI.
States in the west and south saw the greatest population growth.
NY remains the fourth most populous state after California, Texas and Florida.
Domestic migration: 79,163 people moved to Texas from other states.
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Still, residents moving to the US from other countries continue to be a significant factor in USA population growth as 1.1 million people moved to the USA over the past year, according to the census bureau.
From July 2016 to July 2017, almost 115,000 Illinoisans left for other states on net, according to the Census data.
The Census data reveal the cause of Illinois' shrinking population: heavy losses of Illinoisans to other states.
A state official says from 2016 to 2017, Wyoming saw its largest population decrease since 1989.
Idaho had the highest rate of growth, at 2.2 percent.
ME grew 4 percent, Rhode Island by 2 percent, and CT and Vermont basically broke even.
Iowa, meanwhile, gained 14,842 people for an estimated population of 3,145,711.
The census said net worldwide migration decreased 1.8 percent between 2016 and 2017, making it the first drop since 2012-2013.