Metropolitan Regional Info System (MRIS)

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Metropolitan Regional MLS Systems Inc. abbreviated MRIS, represents over 45,000 real estate brokers and agents. It was established in  1993, and is based in Maryland. Today, MRIS is a branch of Bright MLS.

The MLS primarily serves clients in the Mid-Atlantic region, including D.C., Maryland, West Virginia, and Pennsylvania 

Metropolitan Regional Information Systems Inc. has been serving real estate agents and brokers for more than twenty years and has been assisting real estate professionals with the data they need to successfully establish the businesses.


The multiple listing services of the Metropolitan Regional Information Systems (MRIS) is available to all real estate professionals.


  • Anne Arundel County Association of Realtors
  • Harford County Association of Realtors
  • Greater Capital Area Association of Realtors
  • Bay Area Association of Realtors
  • Carroll County Association of Realtors
  • Blue Ridge Association of Realtors
  • Cecil County Board of Realtors
  • Frederick County Association of Realtors
  • Eastern Panhandle Board of Realtors
  • Fredericksburg Area Association of Realtors
  • Dulles Area Association of Realtors
  • Greater Baltimore Board of Realtors
  • Garrett County Board of Realtors
  • Historic Highlands Association of Realtors
  • Greater Piedmont Area Association of Realtors
  • Howard County Association of Realtors
  • Mid-Shore Board of Realtors
  • Massanutten Association of Realtors
  • Northern Virginia Association of Realtors
  • Potomac Highlands Board of Realtors
  • Pen-Mar Regional Association of Realtors
  • Prince George’s Association of Realtors
  • Southern Maryland Association of Realtors
  • Prince William Association of Realtors
  • Washington DC Association of Realtors

MRIS MLS is available throughout the following counties and cities:


  • Anne Arundel
  • Alexandria City
  • Arlington
  • Baltimore City
  • Baltimore
  • Carroll
  • Fairfax
  • Charles
  • Frederick
  • Howard
  • Harford
  • Loudoun
  • Prince Georges
  • Montgomery
  • Prince William
  • Stafford
  • Spotsylvania
  • Washington

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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.