About

Mackoff Kellogg Law Firm is the oldest law firm in western North Dakota and eastern Montana. It provides regional representation throughout North Dakota South Dakota and Montana. As the Mackoff Kellogg Law Firm continues to grow the focus of the firm remains on our core values of Integrity Trust Respect and Results for the community our clients the courts and our families.2014 marked the 125th anniversary of the founding of Mackoff Kellogg Law Firm. The firm has grown from the solo pioneer practice of lawyer Leslie A. Simpson to fifty employees serving clients throughout the Upper Midwest. It is the oldest law firm in western North Dakota and eastern Montana.