8. Concord, N.H. 4,136 households out of 57,844 or 7.2 percent are millionaires.

The New Hampshire state capital is home to local, county, state and federal agencies, along with the law firms and professional agencies that support them. Concord is also a major distribution, industrial and transportation hub. Tourism is a key contributor to the local economy, thanks to the nearby New Hampshire International Speedway. It is also the center of the state's high-tech manufacturing. Concord benefits from being within easy reach of Manchester, the state's largest city, and Boston.