Redding is the county seat of Shasta County, California, USA, located on the Sacramento River and on Interstate 5 south of Shasta Lake. It is the largest city north of Sacramento, as well as the northernmost designated metropolitan area and city with over 100,000 people in California. As of the 2000 census, the city had a total population of 80,865. As of the most recent annexations, the population is approximately 104,295. Redding apartments for rent comparison page shows most up to date rent information on Redding apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.