Alexander Warner (January 10, 1827 – September 6, 1914) was an American Union Army officer, banker, planter, and Republican politician.

[1] Alexander Warner was born on January 10, 1827, in Smithfield, Rhode Island.

[1][3] On January 15, 1862, Warner was appointed lieutenant colonel of the 13th Connecticut Infantry Regiment and sent to Louisiana.

[1] After returning to service, he raised the 5th Louisiana Infantry Regiment for defending the Union-controlled New Orleans.

[1][3] After the war, he bought a large plantation in Madison County, Mississippi, where he employed freedmen and gave them monetary wages.

[1] Warner moved to Pomfret, Connecticut, in 1877, buying a farm there called "Woodlawn".

[10] After his wife died in 1902, Warner moved to his son's house in Point Pleasant, New Jersey, where he spent the rest of his life.

[11] Warner died after a two-week illness in Point Pleasant, New Jersey, on September 6, 1914.