Alexander L. Harris (October 9, 1820 – August 27, 1898) was a Democratic mayor of Kansas City, Missouri in 1866 and 1868.
Harris was born in either Tennessee or Kentucky. He operated a saloon near the Missouri River levee and was councilman from the first ward in 1861–1862.
He was elected mayor in 1866, failed re-election in 1867, was elected again in 1868.
In 1870 was a deputy sheriff for Jackson County, Missouri and became a county commissioner (called county judge) for the county in 1871.