Live ... Learn ... Work or Worship in Harford County. You are eligible for great rates, dedicated service and a superior member experience. Har-co Credit Union is built on the foundation of delivering a strong member focused experience. We believe that our success will only occur by upholding the values and principles of a culture where members, both internal and external, feel rewarded in a relationship. As stewards of this culture, we must be consistent in our actions and beliefs that every point the member touches will yield a satisfying result for them.