OneKey MLS

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OneKey MLS is one of the largest MLS in New York, with more than  40000 participating real estate agents. It was formed as a result of consolidation MLS of Long Island and Hudson Gateway MLS.


Hudson Gateway MLS is an MLS that was founded by merging six local New York Associations of REALTORS: Westchester County Realty Board, Pelham Realty Board, Putnam County Association of Realtors, the Rockland County Board of Realtors, and the Orange County Association of Realtors, Manhattan Association of Realtors.


The Westchester County Realty Board was founded in 1916 in White Plains. In 1947 the Pelham Realty Board merged with Westchester County Realty Board with other associations, quickly following their lead: in 2009 Putnam County Association of Realtors, and the Rockland County Board of Realtors and the Orange County Association of Realtors in 2011,  Manhattan Association of Realtors in 2016.


Here we present major counties and cities that OneKey MLS covers:

Official Website:


  • Bronx County
  • Dutchess County
  • Orange County
  • Putnam County
  • Rockland County
  • Sullivan County
  • Ulster County
  • Westchester County

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How do I get started?

MLS On The Fly™ software packages needed to use the above service and it’s included in the setup. This software will connect your own real estate website to the databases of your MLS Providers so that all the properties will end up on your website. You can request a free Demo before purchase.


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The opinions or information expressed in this article are those of the author and do not necessarily reflect the official views, policy, or position of Realtyna or MLS providers. The information on Realtyna’s Website is general, for informational purposes only, and is not to be relied upon or interpreted as real estate, legal, accounting, or other professional advice or a substitute. Please discuss anything related to the certification process, professional advice or legal procedures with your MLS providers.