Francis Marion Johnson was born on October 22, 1850, in Americus, Jackson County, Mississippi.

[1][2] He was the son of Samuel Wyles Johnson, who died at the Battle of Missionary Ridge, and Marie Louise (Graham) Johnson.

[2] In the 1918 session, he served in the newly added 41st district.

[3] He was re-elected to the Mississippi House of Representatives in 1919 and served there until 1924.

[1] His third marriage was to Annie M. Kirkwood in 1880, and they had one son, named T.