More than 60,000 people travel from Montgomery County into Philadelphia to work each day, according to new data released Tuesday by the Census Bureau's American Community Survey (ACS).

Given the county's population of about 800,000, that may seem an unremarkable figure. Perhaps more interesting, though, is that Philadelphia sends almost the same number of its residents to work in Montgomery County.

Data collected by the ACS between 2006-2010 showed that 60,159 of the 253,071 commuters who worked in Philadelphia said they came from Montgomery County. That was more than Delaware County (51,457) or Bucks County (33,877).

Montgomery County also attracts more of Philadelphia residents for work than Bucks or Delaware counties.

60,551 Philadelphia residents traveled into Montgomery County to go to work each day. Only 26,028 traveled to Bucks County, while 17,732 went to Delaware County. 42,514 worked elsewhere outside the city.

"It is well known that Philadelphia County draws a lot of commuters to work. The detailed information in the American Community Survey tells us where Philadelphia County workers are coming from, where its residents work, and how its commuting patterns compare to those of other large counties," said Brian McKenzie, a Census Bureau statistician who studies commuting.

"This information shapes our understanding of the boundaries of local and regional economies, as people and goods move across the nation's transportation networks."