O'Connor & Thomas, P.C. was founded in 1840 under the name of Davis & Crawford. The current firm is the direct descendant of Davis & Crawford and is the oldest law firm in continuous practice west of the Mississippi.
The firm is a general practice law firm which handles a variety of matters including, but not limited to, business and commercial law, personal injury, family law, and workers' compensation. The firm has offered skilled attorneys to individuals and business clients in Dubuque and the surrounding area for over 174 years.