Northbrook is a suburb of Chicago with a population of 33,591. Northbrook is in Cook County and is one of the best places to live in Illinois. Living in Northbrook offers residents a suburban feel and most residents own their homes. In Northbrook there are a lot of restaurants, coffee shops, and parks. Many retirees live in Northbrook and residents tend to have moderate political views. The public schools in Northbrook are highly rated.