Richar (or Richer) (died 973) was the count of Mons from 963 or 964 and vice-duke of Lower Lorraine from 968.
After the death of Godfrey I, count of Hainault and vice-duke of Lower Lorraine, the Emperor Otto I gave Richar half of the county of Hainault (Mons) with title of count of Hainault. The regions of Valenciennes was given to Amalric.
He was also given the county of Liège. He appears in a charter of 2 June 965 donating money in memory of Godfrey. He was a relation of both the emperor and his brother, Bruno of Cologne, the duke of Lorraine. He last appears in charters in 972.
| Preceded by Godfrey I |
Count of Mons 964–973 |
Succeeded by Reginar |
| Preceded by Godfrey I |
Vice-Duke of Lower Lorraine 964–973 |
Succeeded by Charles |