Tulsa is the second-largest city in the
state of
Oklahoma and
47th-most populous city in the United States. As of July 2014, the population was 399,682, an increase of 7,776 over that reported in the
2010 Census. It is the principal municipality of the
Tulsa Metropolitan Area, a region with 961,561 residents in the
MSA and 1,131,458 in the
CSA. The city serves as the
county seat of
Tulsa County, the most densely populated county in Oklahoma, with urban development extending into
Osage,
Rogers, and
Wagoner counties.