Template:Infobox Congressman Sempronius Hamilton Boyd (May 28, 1828 – June 22, 1894) was a nineteenth century politician, lawyer, judge and teacher from Missouri.
Born in Williamson County, Tennessee near Nashville, Boyd moved to a farm near Springfield, Missouri with his parents in 1840 where he was educated by private tutors. He moved to California in 1849 where he prospected for gold and taught school. He moved back to Missouri in 1854 where he was clerk of the court of Greene County, Missouri from 1854 to 1856, studied law and was admitted to the bar in 1856, commencing practice in Springfield, Missouri. Boyd served as mayor of Springfield in 1856 and at the outbreak of the Civil War, raised the 24th Missouri Volunteer Infantry Regiment for the Union Army, serving as its colonel from 1861 to 1863. He was elected an Unconditional Unionist to the United States House of Representatives in 1862, serving from 1863 to 1865. There, he served as chairman of the Committee on Revisal and Unfinished Business from 1863 to 1865. Boyd was a member of the Republican National Committee from 1864 to 1868, was a delegate to the Republican National Convention in 1864, was appointed judge of the court of the fourteenth judicial district in 1865 and was involved in building and operating the Southwest Pacific Railroad from 1867 to 1874. He was elected back to the House of Representatives as a Republican in 1868, serving again from 1869 to 1871. There, he served as chairman of the Committee on Revolutionary Claims from 1869 to 1871. Afterward, Boyd operated a wagon factory from 1874 to 1876, resumed practicing law and was appointed U.S. Minister and Consul General to Siam by President Benjamin Harrison in 1890, serving until 1892. He died in Springfield, Missouri on June 22, 1894 and was interred in Hazelwood Cemetery in Springfield.
- Sempronius H. Boyd at the Biographical Directory of the United States Congress Retrieved on 2008-02-14
- Sempronius H. Boyd at Find a Grave Retrieved on 2008-02-14
Template:Start box |- ! colspan="3" style="background: #cccccc" | United States House of Representatives Template:U.S. Representative box Template:U.S. Representative box |- ! colspan="3" style="background: #FACEFF;" | Diplomatic posts
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|width="30%" align="center" rowspan="1"|Preceded by
Jacob T. Child |width="40%" style="text-align: center;" rowspan="1"|United States Minister to Siam
October 1, 1890 – June 13, 1892 |width="30%" align="center" rowspan="1"| Succeeded by
John Barrett |- |}