Alexander M. Dockery (February 11, 1845 - December 26, 1926) was a United States Representative and Governor of Missouri. Born near Gallatin, Missouri, he attended the common schools and Macon Academy (Macon, Missouri) and studied medicine. He was graduated from the St. Louis Medical College on March 2, 1865, and commenced practice near Linneus, Missouri. He attended lectures at Bellevue College (New York City) and Jefferson Medical College (Philadelphia) during the winter of 1865-1866. He returned to Missouri and settled in Chillicothe, where he continued the practice of his profession for seven years; he was president of the board of education of Chillicothe from 1870-1872. He served as county physician of Livingston County and in March 1874 returned to Gallatin, where he assisted in organizing the Farmers' Exchange Bank.
Dockery was chairman of the congressional committee of his district and a member of the city council of Gallatin from 1878 to 1881 and mayor from 1881 to 1883. He was a delegate to and chairman of the Democratic State conventions in 1886 and 1901, and was elected as a Democrat to the Forty-eighth and to the seven succeeding Congresses, serving from March 4, 1883 to March 3, 1899; while in the House of Representatives he was chairman of the Committee on Expenditures in the Post Office Department (Fiftieth Congress). Dockery was not a candidate for renomination in 1898 but was Governor of Missouri from 1901-1905 and a delegate to the Democratic National Convention in 1904; he was appointed Third Assistant Postmaster General on March 17, 1913, and served until his resignation on March 31, 1921. He died in Gallatin in 1926; interment was in Edgewood Cemetery, Chillicothe.