|Voice Actor||Kevin Michael Richardson|
|First Appearance||Everybody Talks About the Weather|
Sheriff Mason is a sheriff who attempted to arrest Alan Albright in Everybody Talks About the Weather, because he was accused of causing fires around the town. Later, he thought that the gang were helping Alan in causing the fires, but discovered that it was the DNAliens causing the fires. At the end of the episode, he recruits Alan to help him against any more aliens who show up there.
Ben 10: Alien Force
- Everybody Talks About the Weather (first appearance)