Richard Almgill Harrison (April 8, 1824 – July 30, 1904) was a nineteenth-century politician and lawyer from Ohio.

Richard Almgill Harrison
Member of the U.S. House of Representatives from Ohio's 7th district
In office July 4, 1861 – March 3, 1863
Preceded by	Thomas Corwin
Succeeded by	Samuel S. Cox
Member of the Ohio House of Representatives from the Madison County district
In office January 4, 1858 – January 1, 1860
Preceded by	E. E. Hutchison
Succeeded by	Robert Hutcheson
Member of the Ohio Senate from the 11th district
In office January 2, 1860 – July 3, 1861
Preceded by	Samuel S. Henkle
Succeeded by	Samson Mason
Personal details
Born	(1824-04-08)April 8, 1824 Thirsk, North Yorkshire, England, U.K.
Died	July 30, 1904(1904-07-30) (aged 80) Columbus, Ohio, U.S.
Resting place	Kirkwood Cemetery, London, Ohio
Political party	Unionist
Spouse	Maria Louisa Warner
Children	seven
Alma mater	Cincinnati Law School
Signature

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Born in Thirsk, North Yorkshire, England, Harrison immigrated to the United States with his parents in 1832, settling in Ohio. He attended public schools, graduated from the Cincinnati Law School in 1846 and was admitted to the bar the same year, commencing practice in London, Ohio. He was a member of the Ohio House of Representatives in 1858 and 1859 and was a member of the Ohio Senate in 1860 and 1861. Harrison was elected a Unionist to the United States House of Representatives to fill a vacancy in 1861, serving from 1861 to 1863. Afterward, he continued practicing law in Columbus, Ohio until his death there on July 30, 1904. He was a named a member of the Supreme Court Commission of Ohio in 1876 but refused to serve.^[1] He was interred in Kirkwood Cemetery in London, Ohio.

On December 21, 1847, Harrison was married at London, Ohio to Maria Louisa Warner, and had three daughters and four sons.^[2]