U.S. Route 10S may refer to:

• U.S. Route 10S (Minnesota), a former U.S. Highway in Minnesota
• U.S. Route 10S (Montana), a former U.S. Highway in Montana

• Richard Aquila
• Richard A. Radford
• Richard Arauner
• Richard Archer (politician)
• Richard Arculus
• Richard Ardagh
• Richard Arden, 1st Baron Alvanley
• Richard Arguello
• Richard A. Rifkind
• Richard Armitage (politician)
• Richard Armstrong (Hawaii missionary)
• Richard Armstrong (politician)
• Richard Arnold Shore
• Richard Arnott
• Richard A. Robinson
• Richard Arrington, Jr.
• Richard Arthur (bishop)
• Richard Arthur Walker
• Richard Arundell
• Richard Arundell (died 1758)
• Richard Arundell (MP)
• Richard Arvine Overton
• Richard Ash (American football)
• Richard Ashcroft songs
• Richard Ashley