Redding is a city in Northern California. It is the county seat of Shasta County, California, USA. As of the 2000 census, the city had a total population of 80,865 and has grown to approximately 108,741 due to recent annexations. Redding is the state's largest city north of Sacramento, as well as the northernmost designated metropolitan area and city with over 100,000 people in California. It is the fourth largest city in the Sacramento Valley and the northernmost in the Central Valley.