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He was the lifetime chairman of the Shreveport branch of the English-Speaking Union, which under his leadership became the largest chapter in the [[United States]]. He also served on the advisory board of Feist-Weiller Cancer Center at LSU Health Sciences and as Chairman of the Christus Foundation Board. A member of the LSU-Shreveport Foundation, Delton established the O. Delton Harrison, Jr. Endowed Professorship for the Master of Liberal Arts Program. He served on the board of Centenary College in Shreveport, which named an honorary alumnus.<ref name=obit/>

He was the lifetime chairman of the Shreveport branch of the English-Speaking Union, which under his leadership became the largest chapter in the [[United States]]. He also served on the advisory board of Feist-Weiller Cancer Center at LSU Health Sciences and as Chairman of the Christus Foundation Board. A member of the LSU-Shreveport Foundation, Delton established the O. Delton Harrison, Jr. Endowed Professorship for the Master of Liberal Arts Program. He served on the board of Centenary College in Shreveport, which named an honorary alumnus.<ref name=obit/>

In 1997, he was named the Outstanding Philanthropist of the Year by the North Louisiana chapter of the National Society of Fund-Raising Executives. In 2000, he was named the Louisiana "Patron of the Years" and was recognized as 'intrinsic to the arts in Shreveport." In 2013, he  was selected as one of the five Louisiana Legends by the Friends of Louisiana Public Broadcasting.<ref name=obit/> He was a member of the exclusive Shreveport Club and the Cotillion Club, for which he was Rex VI. In [[Dallas]], [[Texas]], he served on the boards of the Dallas Opera Association and the Dallas Grand Opera, positions which made it possible for him to meet opera greats, such as Beverly Sills and Placido Domingo. He further served on the boards of the Metropolitan Opera and the Metropolitan Museum in [[New York City]]. He also donated generously to the American Museum in Bath, [[England]], and the [[Royal Academy]] in [[London]].<ref name=obit/>

In 1997, he was named the Outstanding Philanthropist of the Year by the North Louisiana chapter of the National Society of Fund-Raising Executives. In 2000, he was named the Louisiana "Patron of the Years" and was recognized as 'intrinsic to the arts in Shreveport." In 2013, he  was selected as one of the five Louisiana Legends by the Friends of Louisiana Public Broadcasting.<ref name=obit/> He was a member of the exclusive Shreveport Club and the Cotillion Club, for which he was Rex VI. In [[Dallas]], [[Texas]], he served on the boards of the Dallas Opera Association and the Dallas Grand Opera, positions which made it possible for him to meet opera greats, such as Beverly Sills and Placido Domingo. He further served on the boards of the Metropolitan Opera and the Metropolitan Museum in [[New York City]]. He also donated generously to the American Museum in Bath, [[England]], and the Royal Academy in [[London]].<ref name=obit/>

Roger Earl Mayence (born 1984), a Harrison employee, said that the philanthropist:

Roger Earl Mayence (born 1984), a Harrison employee, said that the philanthropist: