John Alexander Steiner (March 16, 1816 – April 20, 1902) was an American politician from Maryland.

He served as a member of the Maryland House of Delegates, representing Frederick County in 1867.

[1][2][3] After leaving his studies, Steiner worked in shoe making, lumber, and brick manufacturing.

[2] At the outbreak of the Civil War, he along with William P. Maulsby and Edward Shriver organized the 1st Maryland Infantry Regiment, Potomac Home Brigade.

[1][2][3][5] Prior to the war, Steiner was a Whig and afterward aligned with the Republican Party.

He was active in the Evangelical Reformed Church of Frederick and was elected as the congregation's deacon and elder.

[1][2][3] He was elected vice president of the Synod of the Potomac at its session in Carlisle, Pennsylvania, on October 9, 1889.

Their seven children were Charles Henry, Mary Amelia, John Edgar, Ira Frank, Kate Brunner, Fannie Elizabeth and Edward Everett.