National Sheriffs' Association The National Sheriffs' Association, now in its sixty-eighth year of serving law enforcement and other criminal justice professionals of the nation, is a non-profit organization dedicated to raising the level of professionalism among those in the criminal justice field. Through the years, NSA has provided programs for Sheriffs, their deputies, chiefs of police, and others in the field of criminal justice to perform their jobs in the best possible manner and to better serve the people of their cities, counties or jurisdictions. See Full Partners List