Founded as the graduate school to Washington Bible College, Capital Bible Seminary was established in 1958 to provide theological education in a graduate level, preparing Christian men and women for effective Christian leadership in a multicultural contexts around the world. The Seminary offers its graduate level programs at the main campus in Greenbelt, Maryland and the Virginia Extension in Springfield, Virginia.

Both Washington Bible College and Capital Bible Seminary are unaffiliated with any denominations or association but seeks to function in cooperation with all churches that are committed to the historic, fundamental Christian faith, and that share its standards, ideals and goals. The Seminary currently offers a Biblical Studies Certificate, a Certificate in Christian Counseling and Discipleship, a Master of Arts (M.A.) degree (Biblical Studies, Christian Counseling and Discipleship, and Ministry Leadership), a Master of Divinity (M.Div.) degree, and a Master of Theology (Th.M.) degree.

Dr. George M. Harton serves as the current president of Washington Bible College and Capital Bible Seminary.