Sites of general interest on California may be listed under specific counties. It offers a complete profile on Los Angeles County.
Information is mostly employment oriented.
This web site provided some useful government information such as population, average years of schooling, and mean incomes. There is information regarding the population of Orange County and all constituent cities, employment rates, mix of business, economy, and income. The site is easy to use since there is not much information. Recommended to take a look. Basically, the information found here was very narrow in scope.