Below are a list of the cities located in Northumberland County, PA. There are 25 total unique zip codes in Northumberland County, Pennsylvania. The time zone for Northumberland County is the Time zone and they follow daylight savings time. The Federal Information Processing System (FIPS) Code for echo $county.' County, '.$state_abbrev ?> is 42097.
The population in Northumberland County, PA is currently 91,266. That is a decrease of -3.19% vs the population of 94,528 in 2010.
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