Redding, officially the City of Redding, is the county seat of Shasta County, California, in the northern part of the state. It lies along the Sacramento River, is 162 miles north of Sacramento, and 120 miles south of the Oregon border. Interstate 5 bisects the entire city, from the south to north before it approaches Shasta Lake, which is located 15 miles to the north. The 2010 population was 89,861. Redding is the largest city in the Shasta Cascade region, and it is the fourth-largest city in the Sacramento Valley, behind Sacramento, Elk Grove, and Roseville.