Arthur W. Brown is an American diplomat who is serving as the United States ambassador to Ecuador.

Before that, Brown served as the USAID Director in the Dominican Republic for four years, with almost half the tenure working with the Department of State as Deputy Chief of Mission at the U.S. Embassy in Santo Domingo.

Additionally, Brown served in Kabul, Afghanistan and in Kinshasa, Democratic Republic of the Congo as USAID's Deputy Director.

Other assignments for Brown include serving in various roles in Botswana, Guinea, Nigeria, Sierra Leone, Haiti, Jamaica, Barbados, and Namibia.

Brown also served as a Rural Community Development Extension Agent in Benin, where he was a Peace Corps Volunteer.