Mullin and his wife Christie have five children: Jim, Andrew, Larra, Ivy, and Lynette.  The Mullin family currently resides in Westville, Oklahoma on the same family farm where Markwayne was raised.

A graduate of Stilwell High School, Mullin attended Missouri Valley College on a wrestling scholarship.  Shortly after, Mullin’s father fell ill and the family’s small plumbing company encountered financial troubles.  Mullin left college to return home and take over his family’s business, forgoing his wrestling scholarship and eduation. 

Today, Mullin Plumbing is one of the largest service companies in the region, employing over 150 Oklahomans. The business is only one of several successful companies owned and operated by the Mullin family.  Others include Mullin Environmental, Mullin Plumbing West Division, Mullin Services, Mullin Properties, and Mullin Plumbing New Construction.

In 2010, Mullin completed his education and received his degree in Applied Science in Construction Technology from the Oklahoma State University Institute of Technology.

Mullin currently serves on the House Energy and Commerce Committee whose broad jurisdiction includes issues important to rural Oklahoma including energy policy, health care, commerce, and manufacturing.  He sits on three subcommittees: the Subcommittee on Energy, the Subcommittee on Health, and the Subcommittee on Digital Commerce and Consumer Protection.  Additionally, Mullin is a member of a number of caucuses, and is a co-chair of the Men’s Health Caucus and of the Regulatory Review Caucus.

During his time in the U.S. House of Representatives, Mullin has been a strong voice for business owners across Oklahoma, bringing their perspective into the national debate on many issues that directly impact the business community.  As one of only two Native Americans currently serving in the House, Mullin brings a firsthand knowledge of Native American issues to Washington, D.C.   

Mullin also serves as a member of the Republican Whip Team.  Representatives who are members of this team work closely with Republican leadership to ensure every American’s voice is heard in Congress.

Each of the committees and caucuses Mullin serves on aims to solve problems facing the constituents of Oklahoma’s Second District.  Mullin is dedicated to serving the people of his district with honesty and integrity, and fights each day to ensure his constituents’ voices are heard in Congress.  A family man grounded by a deep faith and love for his country, Mullin strives to serve the Second District with the same principles in which he leads his life.