The Ambassadors of Harmony (AOH) is a 120+ member men's barbershop chorus, based in St. Charles, Missouri.

Their Christmas shows are among the most popular holiday concerts in St. Louis,[19] averaging over 7,000 patrons per year, while their youth programs continue to expand and equip young singers in substantive ways.

[20] The chorus has established a foundation to ensure that its mission to youth will continue to deepen, and as of 2017 it added an annual fundraising gala to its calendar to engage the community to join in their goals.

[25] The chorus was directed by noted arranger[26] and mathematician David Wright[27][13] (now associate director) from 1981 to 1990[22][28][29][30] and again in 1999 to 2000[31] and has been directed from 1991 to 1999[32] and since 2001[33] by Dr. Jim Henry (now co-director), bass singer of the 1993 International Quartet Champion, The Gas House Gang,[34][35][36] and the 2009 International Quartet Champion, Crossroads.

The winner was then determined by the singing category score, earning AOH its first silver medal.