Shasta County, officially the County of Shasta, is a county located in the northern portion of the U.S. state of California. As of the 2010 census, the population was 177,223. The county seat is Redding. Shasta County comprises the Redding, CA Metropolitan Statistical Area. The county occupies the northern reaches of the Sacramento Valley, with portions extending into the southern reaches of the Cascade Range. Points of interest in Shasta County include Shasta Lake, Lassen Peak, and the Sundial Bridge.