About Mark D Olejniczak Realty, Inc.
Mark D. Olejniczak Realty, Inc. is a full-service real estate company serving the Northeast Wisconsin areas of Green Bay, Appleton, Oshkosh, and Fond du Lac.
Established in 1980, 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.

A Green Bay Tradition
Mark D. Olejniczak Realty, Inc. has been a Green Bay tradition since 1980. Mark Olejniczak Realty, Inc. is a 4th generation real estate company dating back to 1906 and is one of the longest-standing independent brokerages in Northeast Wisconsin.
The Mark Olejniczak Realty Inc 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 Realtors have over 22 average years of experience per sales associate. When it comes to buying and selling real estate, we offer expert-level service.
#1 Real Estate Agency in Green Bay WI – Best of the Bay 11-Time Winner!
Mark D. Olejniczak Realty, Inc. is an 11-time winner of the Green Bay Press-Gazette Reader’s Choice Award for Best Real Estate Agency in Green Bay WI.
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 in Realty
The staff at Mark D. Olejniczak Realty, Inc. are happy to celebrate five consecutive years of success with an average total sales of $157 million and an average sales per agent of $4.4 million including all residential, multi-family, investment, and vacant land properties sold.
Todd was awesome to work with and I would highly recommend him to anyone looking to buy or sell their house
Working with Pam was wonderful.
Wendy
The first house sold within one month and the second sold in less than one week!
Stephanie Callahan
Cha is honest and will bend over backward to find the house of your dreams!
Mai Thao Baldridge
Dennis did an excellent job for our business
Jordan is hands down the BEST!
Mike C.
Andrea did a great job being resourceful and finding us a home in a market where nothing was available.
Through her connections, she found a home before it hit the market. We were looking to move quickly and she got us in our house by the date we wanted to relocate. The neighborhood she recommended was a perfect fit for our family. She is a hard worker, has great contacts, and always returns phone calls and emails in a timely manner! She is always prompt and very conscientious! She is very passionate about her job!
I highly endorse Sara for impeccable service.
Our home sale with Todd was a wonderful experience and would highly recommend Todd for your real estate agent!
Samantha was available, responsive, and got our home sold in 4 days!
Mr. Koehler made the buying process pain free and his expansive knowledge and professionalism were beyond what we asked for.
Trevor Michael
It was a pleasure working with Andrea!
Dennis is an expert in real estate in the Green Bay area!
Andrea Pasqualucci
Dave was proactive in getting our places sold and we felt like we were a priority.
Tony
A home purchase or sale can be a stressful situation, but Julie is always one step ahead.
Deb Meyer
Dave is hardworking and treats us as if we are family.
Jenny Deuster Woldt
Our process was completely smooth from the beginning to the end and Pam was always there to answer all of our questions at any time.
Next Chapter
Cha is a great realtor!
Mrs. Lauj
Thank you Todd for finding us our family’s first home!
Julie did an excellent job of selling our house in less than a week!!!
Jennifer
Working with Dave was wonderful.
Holly
We would highly recommend him!
Awowale
Jimmy goes the extra mile for his clients!
Megan Diedrick
Sara knows her real estate and she’s just a very nice person.
Pat
Julie is very knowledgeable and honest.
Samuel Johnson
You will not find a sharper realtor than Barb!
Jack Koehne
Andrea was wonderful to work with!
Patrick was very helpful while we were buying our cottage.
The Vande Voorts
I certainly would retain Dave again with any future real estate transaction!
Linda J. Knutson
We definitely recommend Jordan to anyone looking to buy or sell a home!
Hope
Dennis was amazing!
Jessie
Throughout our home buying journey, Todd was truthful, responsive, and knowledgeable.
Randy did an absolutely fantastic job selling our house!
Brian Boeckman
Dennis took care of everything!
Bunny
Laura is very responsive and exceeded our expectations
Sarah Schwarten
Julie is first class!
Allison D
The only Realtor I would recommend.
Lindsay K.
Todd has helped us with the sales of three homes and the purchase of a third.
I am not regretting my decision at all, and Ed definitely made a difference with that!
Tess
I highly recommend Randy.
Ed Angelbeck
Jane is an exceptional advantage for a buyer.
DJ
Mark has been great!
Mike Kelly
Our agent was Samantha Carter. Very pleasant to work with and answered questions in a timely manner.
Barb gets the job done!
Laurel Chang Kime
Amazing people
I highly recommend James Koehler.
Tyler Romenesko
Pam was always available to answer questions and went beyond my expectations!
Bonnie
A Realtor© is available at our office 5 days a week, 8 am – 5 pm and on-call during nights and weekends to answer any question you may have about buying or selling real estate in Northeast Wisconsin.
Call
Toll-Free
Fax
Email Address
Address
Mark D. Olejniczak Realty, Inc.
375 W. St. Joseph St.
Green Bay, WI 54301
Free Home or Property Valuation
A home valuation report can help you decide if buying or selling a property is right for you. Our local real estate agents will provide you with the insight you need to price and sell your home. Fill out our short form to get a free report for your Northeast Wisconsin area home or property.
Free Market Report
View average property values, inventory, and market changes in Northeast Wisconsin by zip code.
How Do I Find a Good Mortgage Lender?
Search For Homes or Real Estate in Northeast Wisconsin

Things to Leave Behind When You Sell Your Home
Things to Leave Behind When You Sell Your Home When you sell your home, you are required to leave behind everything specified in the contract. That said, as a courtesy, some other items should stay […]

Mark Olejniczak Realty, Inc. Gets in the Holiday Spirit with Best Christmas Ever, Salvation Army, Toys for Tots
Mark Olejniczak Realty, Inc. Gets in the Holiday Spirit with Best Christmas Ever, Salvation Army, Toys for Tots Our real estate company is coming together this holiday season to give back to the community that […]

The Many Responsibilities of a REALTOR®
The Many Responsibilities of a REALTOR® A REALTOR® is obligated to do everything they can to sell their client’s home for the best price in the shortest amount of time. Here are some of […]