Where did Thomas S monson serve his mission?

Answer 1

President Thomas S. Monson never served a full-time mission from the Church, instead he served in the United States navy.

In fact, none of the current First Presidency (Thomas S. Monson, Henry B. Eyring, and Dieter F. Uchtdorf) served as full-time missionaries for the Church.

Answer 2

Thomas S. Monson, President of the Church of Jesus Christ of Latter-day Saints (the 'Mormon' church) has two sons, Clark Spencer Monson and Thomas Lee Monson.

Thomas Lee Monson served as a missionary in Milan. I could find nothing about Clark Spencer Monson serving as a missionary.

Answer 3

President Dieter F. Uchtdorf, Second Counselor in the First Presidency of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church), did not serve as a missionary for the church. During the years that he would have served a mission, he was in the West German Air Force.