PHILADELPHIA (CBS) - Feeling crowded?  You may find the reason why in the just-released Pennsylvania results from the 2010 Census.

Pennsylvania’s population is now 12.7 million — up 3.4 percent in the last decade.  Philadelphia’s population actually rose a little, reversing a 50-year trend.

But Robert Groves, the director of the US Census Bureau, says the suburbs are growing even faster.

“Delaware County, Montgomery, and Bucks all grew at higher rates,” Groves told KYW Newsradio this morning.  “In fact, Chester County, a little to the west, experienced the largest growth of all the counties in the state.”

Hear Mike DeNardo’s full interview with Robert Groves in this CBS Philly podcast…

The population of Pittsburgh, on the other hand, declined by 8.6 percent.

Groves says as far as ethnicity, Pennsylvania is following the national trend with an 83 percent increase in the Hispanic population.

Groves says that even though Pennsylvania’s population grew, the Commonwealth will still be losing one of its 19 Congressional seats because southern and western US states are seeing faster growth.

Reported by Mike DeNardo, KYW Newsradio 1060.