Yep, straight from Wikipedia
All filming is done in the Greater Los Angeles area, but the show makes many references to actual places and businesses in and near Scranton, such as the Mall at Steamtown, Lake Wallenpaupack, Abe's Deli, and the Lackawanna County Coal Mine Tour. Dwight's "Froggy 101" bumper sticker is from local country station WGGY. "We went toward embracing the whole Scranton-ness of the setting," said Daniels.[46]
[edit]Filming locations
The show's first season had a run of just six episodes, and was filmed on location in an actual office.[42] For the second season, since NBC ordered a full run of episodes, filming moved to a sound stage at Valley Center Studios in Van Nuys, built to replicate the first season's environment,[42] including plaques and certificates hanging on walls using the names of crew members.[49] So although technically a "studio" production, the show maintained its "on location" feel by recreating that first season set at Valley Center Studios.