• Howard County Government

• Business: Howard County Chamber of Commerce
  
• Education: Howard County Public Schools
• Education: Howard Community College
• Libraries: Howard County Library
• Social services: Columbia Foundation, Howard County's Community Foundation
• Social services: Howard County Department of Social Services
• Social services: Howard County Forestry Board
• Sports: Howard County Special Olympics
• Voter Information

• Columbia - Columbia Association website

STATISTICS - 2000 census

• Population and Housing
• People, Business, Geography Quick Facts

STATISTICS - 1990 census

• Business Patterns
• Housing Characteristics
• Income Statistics
• Labor Force and Commuting
• Social Characteristics

OTHER MARYLAND COUNTIES AND MULTI-COUNTIES