Alexander Barkley (1817 - 1893) was an American politician from New York.
Barkley was born on May 4, 1817 in Argyle, Washington County, New York.
He was the son of James Barkley (1789–1843) and Margaret (MacDougall) Barkley (1795–1857).
In 1861, he was appointed Superintendent of Canal Repairs for Sections 1 and 2 of the Champlain Canal. He was a member of the New York State Assembly (Washington Co., 1st D.) in 1865 and 1866.
At the New York state election, 1868, he ran for Canal Commissioner on the Republican ticket but was defeated by Democrat Oliver Bascom. At the New York state election, 1870, he ran again but was again defeated, this time by the incumbent Democrat George W. Chapman. At the New York state election, 1871, he ran again and was elected, being in office from 1872 to 1874. At the New York state election, 1874, he was defeated for re-election by Democrat Adin Thayer. During the investigation of the Canal Ring, Barkley was indicted by a grand jury in Buffalo, New York for conspiracy.
Barclay died January 2, 1893 at Argyle, Washington County, New York.
He was buried at the Prospect Hill Cemetery in Argyle, New York.
| years = 1865–1866| before = R. King Crocker| after = Thomas Shiland}}