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Mark D. Olejniczak Realty, Inc.
375 W. St. Joseph St.
Green Bay, WI 54301

About Us

About Us


Northeast Wisconsin Green Bay Area Real Estate

We are a full-service real estate company of professional Realtors®, brokers and estate agents serving Northeast Wisconsin. Our extensive experience, proven track record, and dedication to our customers help define us as one of the premier real estate agencies in the area.


The process of buying and selling real estate can be mind-boggling, but you can rest easy knowing an agent from Mark D. Olejniczak Realty, Inc. is working for you. We make this process as smooth as possible by providing you with the information and advice you need to achieve your real estate goals.


Mark D. Olejniczak Realty, Inc. was founded in 1980.

Our Advantage

Nearly 38% of our realty staff has earned the Certified Residential Specialist (CRS) designation from the Residential Real Estate Council, compared to only 3% of Realtors nationwide! Our agents also have an average of 21.4 years of experience each. When it comes to real estate, we are the experts.


Local Leaders

Mark D. Olejniczak Realty, Inc. is proud to be the recipient of the Green Bay Press-Gazette Reader’s Choice Award for Best Real Estate Agency in Green Bay from 2008-2012, and 2014-2019. We are thankful for this designation and consider it a great honor.


Our office is located in Allouez, one of the many historic and beautiful neighborhoods in Green Bay. We are proud to have been the recipients of the Allouez Business Association Allouez Excellence in Business Award in 2011 in the large business category. This award is extra special because it can only be won every 10 years! Thank you Allouez Business Association!


Five Consecutive Successful Years

The staff at Mark D. Olejniczak Realty, Inc. are happy to celebrate five consecutive years of success (2014-2018) with an average total sales of $159 million and an average sales per agent of $4.5 million including all residential, multi-family, investment, and vacant land properties sold.


15,111 Open Houses and Counting

During the past 11 years, the talented staff at Mark D. Olejniczak Realty have successfully completed 15,111 open houses. All open houses are published in a full-color Sunday advertisement in the Press Gazette and posted on our website weekly, every Thursday at 2 pm.


Put Our Sales to Work for You

When compared to other companies our agents have the highest sales volume of residential properties in our area. Big or small, we sell them all!


Watch Our About Us Video