Costello Porter Law

Outstanding Legal Service Since 1889

madison.jpg Costello Porter has been practicing Law for 125 years, and was already providing legal services to clients when South Dakota joined the Union in 1889.

The firm has represented a diverse clientele, including individuals, corporations, and partnerships, including Fortune 500 companies; medical clinics and surgical centers; insurance and bonding companies; members of the banking and construction industry; professionals such as doctors, architects, engineers, and lawyers; Indian Tribes; and major employers and their employees throughout the State of South Dakota, North Dakota, and Wyoming.

Five of its attorneys have over 50 years of legal experience each.

Costello Porter is proud of its attorneys and their broad range of trial experience in state, federal, administrative and tribal courts. Many of the firm's attorneys have served as judicial clerks for the South Dakota Supreme Court, the State's Circuit Courts, and the State's Federal Courts.

Our members are active in the South Dakota and American Bar Associations, as well as regional and tribal bar associations; the South Dakota Trial Lawyers Association; the Defense Research Institute; the prestigious American Board of Trial Advocates, American College of Trial Lawyers and International Association of Defense Counsel. Attorneys are listed in the Best Lawyers of America and Chambers USA (America's Leading Business Lawyers).

News and

Trial and Litigation News

Donald Porter, along with Chris Christianson; and the able and collaborative work of Jess Pekarski and others in the firm finally and forever ended a long running dispute between the City of Rapid City and a subdivision development company with a trial win…

Trial and Litigation News

Fewer lawsuits are being tried these days and fewer yet tried to juries. However, the success or failure of informal resolution or a mediated settlement often depends in part on how the parties perceive each other as trial opponents...

Employment Law: Rights, Benefits, and Emerging Issues

On February 7, 2017, Heather Lammers Bogard spoke at “Employment Law: Rights, Benefits, and Emerging Issues” at the Holiday Inn in Rapid City.