Tulsa /ˈtʌlsə/ is the second-largest city in the State of Oklahoma and 47th-most populous city in the United States. As of July 2013 the population was 398,121, an increase of 6,215 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.