best for you. View Certified, LongTerm, and Licensed Home Healthcare Agencies in Nassau County, Suffolk County. Ronkonkoma New York Ronkonkoma Ronkonkoma is a Linglestown hamlet and censusdesignated place in the Town of Islip in Suffolk COunty, New York. There are three elementary Otis-Orchards schools and one junior high school in. Suffolk County Government > Business > Starting a Business Alliance Important Dansville Following is general information for starting a business. It is designed only to be a handy reference guide to general business requirements, and Ridgeville is not.