The Maryland county executive elections of 1990 took place on November 6, 1990. Anne Arundel County, Baltimore County, Harford County, Howard County, Montgomery County, and Prince George's County elected county executives.
Anne Arundel County Democratic primary Candidates Nominee Theodore J. Sophocleus, county councilmember
Eliminated in primary Patricia Aiken, former state delegate Dennis Callahan, former mayor of Annapolis Michael F. Gilligan, county councilmember
Results
Republican primary Candidates Nominee Robert R. Neall, former state delegate
Eliminated in primary William J. Steiner Jr., restaurateur
Results
General election Results
Baltimore County Democratic primary Candidates Nominee Dennis F. Rasmussen, incumbent county executive
Results
Republican primary Candidates Nominee Roger B. Hayden, former member of the Baltimore County Board of Education
Eliminated in primary Charles P. Harbaugh, businessman and candidate for county executive in 1966 Robert T. Petr, insurance executive and nominee for county executive in 1986
Results
General election Results
Harford County Democratic primary Candidates Nominee Eileen M. Rehrmann, state delegate
Eliminated in primary Barbara A. Risacher, county councilmember John P. Seisman, accountant
Results
Republican primary Candidates Nominee Geoffrey R. Close, former mayor of Bel Air
Results
General election Results
Howard County Democratic primary Candidates Nominee Elizabeth Bobo, incumbent county executive
Results
Republican primary Candidates Nominee Charles I. Ecker, former deputy superintendent of Howard County Public Schools
Eliminated in primary Gilbert South, businessman and nominee for county executive in 1986
Results
General election Results
Montgomery County Democratic primary Candidates Nominee Neal Potter, county councilmember
Eliminated in primary Sidney Kramer, incumbent county executive
Results
Republican primary Candidates Nominee Albert Ceccone, real estate consultant and perennial candidate
Results
General election Results
Prince George's County Democratic primary Candidates Nominee Parris Glendening, incumbent county executive
Eliminated in primary Arthur B. Haynes, schoolteacher and candidate for county executive in 1982 and 1986 Artie L. Polk, pastor Floyd E. Wilson Jr., county councilmember
Results
Republican primary Candidates Nominee Charles W. Sherren Jr.
Results
General election Results
References