Adna Romulus Johnson (December 14, 1860 – June 11, 1938) was a teacher, lawyer, and Republican U.S. Representative from Ohio who served one term in Congress from 1909 to 1911. He was born in Sweet Springs, Missouri, on December 14, 1860. In 1864 he moved with his mother to a farm in Lawrence County, Ohio, where he was raised. There he attended the common schools, receiving a basic education typical of rural Ohio in the post–Civil War era.
As a young man, Johnson began his professional life in education. He taught school for seven years in Lawrence County, an experience that provided him with practical knowledge of local communities and public institutions. During this period he developed an interest in the law and undertook legal studies while still engaged in teaching. His early work as a teacher laid the foundation for his later public service and legal career.
Johnson pursued formal legal education at the University of Michigan Law School in Ann Arbor, from which he graduated in 1887. He had been admitted to the bar in 1886, prior to completing his law degree, a common practice at the time. After graduation he settled in Ironton, Ohio, where he commenced the practice of law. His abilities as an attorney were soon recognized, and in 1889 he was elected prosecuting attorney of Lawrence County, a position that gave him significant responsibility in the administration of local justice and further established his reputation in the legal community.
Building on his legal and local public service experience, Johnson entered national politics as a member of the Republican Party. He was elected as a Republican to the Sixty-first Congress, representing Ohio in the U.S. House of Representatives from March 4, 1909, to March 3, 1911. His term in Congress coincided with a significant period in American history marked by progressive-era reforms and debates over economic regulation, tariffs, and governmental authority. As a member of the Republican Party representing Ohio, Johnson contributed to the legislative process during his single term in office, participating in the democratic process and representing the interests of his constituents. In 1910 he was renominated without opposition for another term, but he declined to accept the nomination and chose not to seek reelection.
After leaving Congress, Johnson resumed the practice of law in Ironton. He expanded his professional activities beyond the courtroom, engaging in banking and becoming financially interested in various manufacturing concerns, reflecting the broader economic development of southern Ohio in the early twentieth century. His standing in the legal profession continued to grow, and in 1933 he served as president of the Ohio State Bar Association, a position that recognized his long experience and leadership within the state’s legal community.
Adna Romulus Johnson remained in Ironton for the rest of his life. He died there on June 11, 1938, and was interred in Woodland Cemetery in Ironton, Ohio.
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