Baldwin V of Hainaut (1150 – 17 December 1195) was count of Hainaut (1171–1195), count of Flanders as Baldwin VIII (1191–1195) and margrave of Namur as Baldwin I (1189–1195).
He was the son of Baldwin IV, Count of Hainaut. Flanders was acquired via his marriage to Margaret I of Flanders in 1169. Namur was acquired from his mother Alice of Namur.
With Margaret, Baldwin had the following issue:
| Preceded by Philip |
Count of Flanders 1191–1194 With: Margaret I |
Succeeded by Baldwin VI/IX |
| Preceded by Baldwin IV |
Count of Hainaut 1171–1195 |
|
| Preceded by Henry |
Marquis of Namur 1189–1195 |
Succeeded by Philip I |