Census Data & Tax Information The 2020 population for Cumberland County was 259,469, a 10% increase since 2010, making it the fastest growing county in the state. Cumberland Valley offers a low-cost of living, access to large metropolitan lifestyles, and exceptional educational systems that provide for a highly functioning workforce. View detailed information on our key industries and housing information. Find the most recent census data including demographics. Tax Information Cumberland County is AAA bond rated and a Pennsylvania third class county, having been elevated from fourth class county status in 2013. Real Estate Taxes: All real estate property in Cumberland County is subject to taxes on the local level. All school districts, most municipalities and the county collect real estate tax. View the Cumberland County Real Estate Tax Rate Guide. Corporate Income Tax: 9.9% Earned Income/Local Services Tax: Up to a maximum of $52 per year State Sales Tax: 6% Local Hotel Tax (Room Tax on Overnight Stays): 3% For more information about Pennsylvania’s taxes, visit the Pennsylvania’s Department of Revenue.