Mid America Regional Information Systems (MARIS) administers the Multiple Listing Service (MLS) for the St. Louis, St. Charles County, Jefferson and County Associations and the Franklin County, East Central, South Central and Pulaski County Boards of REALTORS®. The MLS website contains information to help agents achieve the goal of listing and selling real estate.

The MLS is more than just listings; it is a tool underutilized by most REALTORS®. The MLS can be used to store contacts/prospects, manage clients, create CMA presentations for clients, look at trends, save searches, do reverse prospecting and create customized report formats, just to name a few of the tools within the MLS.

MARIS offers a variety of other products along with the MLS. These products include Realist, a tax records database integrated into the MLS. There are also products to help members market listings, get information about down payment resources for their buyers, set up showing appointments right in the MLS, syndicate listings, and see accurate, up to date loan information on properties. Check out the Products page on for more information!

MARIS offer FREE training classes. Classes are held regularly at the St. Charles REALTORS® office. Registration is required and you may sign up for classes on the MARIS website

An additional feature you will see when you sign on to the MLS Homepage is the NEWS. MARIS and the Association use this format to communicate with members about important updates, events, classes and seminars being offered through MARIS or your Association.

MARIS does its own billing and provides technical support for its members. The Association and MARIS work together to provide members with the best possible customer service!

You may contact MARIS using the following:

Phone: 314-984-9111
Tech Support is available M-F 8:30-5:00 or Saturday 9:00-1:00
Email Support:
Mailing address is: 1716 Hidden Creek Ct, Suite 150, St. Louis, MO 63131