Flavius Marion Gibson Sr. (February 12, 1867 – April 6, 1922) was a Texas legislator who served in the Texas Senate for district 3 representing Fannin County and Bonham County.

Flavius Marion Gibson[1] was born in Virginia on February 12, 1867.

He was a teacher and was a superintendent for a public school, he also practiced law.

He died on April 6, 1922, at the age of 55, in his home in Bonham, Texas following a ten day long illness.

His final resting place is Wild Willow Cemetery in Bonham, Texas.