Cumberland County Population & DemographicsSince the last census data, Cumberland County has seen an increase in population to approximately 243,764 in 2014, which has taken the county from a fourth class county to a third class county. Cumberland Valley offers a low-cost of living, access to large metropolitan lifestyles, and exceptional educational systems that provide for a highly functioning workforce.Cumberland County PopulationYearPopulation1990195,2572000213,6742010235,406Change 2000-2010+10.2%Largest Townships 2010 CensusTownshipPopulationHampden Township28,044Carlisle Borough (County Seat)18,682East Pennsboro Township18,254Lower Allen Township17,437Silver Spring Township10,592Household Income 2010-2014HouseholdsAmountTotal Households95,835Less than $35,00026%Between $35,000 & $75,00034.3%Change 2000-201038.8%Median Household IncomeYearAmount2000$46,7662010$52,371Median AgeYearAge200038.1201440.7Age Distribution 2011Age Group20002011Under 2532.6%30.4%25-4428.5%25.2%45-6424.1%27.4%65+14.8%17%