Tioga County, New York. The mission of the Tioga County, New York, Department of Economic Development & Planning is to increase the number of job opportunities, reduce the local per-capita tax burden, and facilitate the highest quality of life for our residents. From planning to community development to structuring your next business venture, we are a one-stop shop of professionals dedicated to finding solutions. We provide planning outreach; networking with municipal, state and federal officials; and work with new and existing businesses. Our team is ready to discuss your next project – please contact us to schedule an appointment.