Waco is a city in and the county seat of McLennan County, Texas. Situated along the Brazos River and on the I-35 corridor, halfway between Dallas and Austin, it is the economic, cultural, and academic center of the 'Heart of Texas' region. The city has a 2010 population of 124,805 - an increase of almost 10 percent since the 2000 census. The Waco Metropolitan Statistical Area consists of just McLennan County, which has a 2010 population of 234,906.