Clemens has four younger sisters. He majored in Business Administration at the University of Oregon. Earning International League All Star recognition in 1998 Clemens is an active member of Catholic Athletes for Christ. He and his wife Nicole currently reside in Walla Walla, Washington. Clemens also expressed a feeling of deep honour when Pope Benedict XVI blessed and kissed their four-week-old baby girl at the final procession of the Papal Mass on April 17, 2008 at Nationals Park in Washington D.C. Clemens, in appreciation for the blessing, gave Pope Benedict his autograph by signing his mitre.