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Three midstate counties are among fastest-growing in Pa.

The midstate is home to not just one but three of the fastest-growing counties in the commonwealth, according to the latest Census estimates.

The Pennsylvania State Data Center, the commonwealth’s official source for population statistics and a Census partner, reported today that Cumberland County remains the fastest-growing county in Pennsylvania. But it has company.

Lebanon County was No. 3 in the state with 4 percent growth in population since 2010, which pushed its population to 138,863, followed by Lancaster County at No. 5 at 3.7 percent growth. There are an estimated 538,500 people living in Lancaster County.

Cumberland County’s population has risen 5.6 percent since 2010 with an estimated 248,506 people living there as of July 1, 2016.

Centre and Lehigh counties were No. 2 and No. 4, respectively, with 4.8 percent and 3.9 percent growth. Dauphin County, by comparison, grew by 2.1 percent with an estimated 273,707 people. York County grew 2 percent and has an estimated 443,744 people.

By numerical growth, Lancaster County was No. 2 in Pennsylvania with 19,052 people added since 2010.

Montgomery County led all counties with population growth of 21,841 since 2010, according to the analysis.

Pennsylvania’s southeast and southcentral counties continue to show growth, while the rest of the state has experienced population declines. The population has shrunk in 44 counties since 2010, with the biggest drops hitting Westmoreland (9,706), Cambria (8,942) and Schuylkill (4,716) counties.

By percentage loss of population, Cameron County was highest, at 8 percent since 2010. Cambria County was No. 2 at 6.2 percent, followed by Susquehanna County at 5.7 percent.

The commonwealth’s population overall has grown by 0.6 percent since 2010 with an estimated 12.8 million people living here, according to the Census. Pennsylvania still ranks sixth in the nation for total population, though its population declined between 2015 and 2016, the first drop in about three decades.

Other population facts

The data center also broke down year-over-year population growth. Between 2015 and 2016, Cumberland and Lebanon counties tied for largest percentage gain in the commonwealth at 0.8 percent.

By natural increases — births in Pennsylvania minus deaths — Philadelphia County led the way since 2010 with a jump of 51,304 people. Lancaster County was No. 2 with 14,720.

The largest net migration of people moving into a county since 2010 occurred in Montgomery County with 12,054, followed by Cumberland County with 10,691.

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