K.F.C. Diest
| Full name | Koninklijke Football Club Diest |
|---|---|
| Founded | 1909 |
| Dissolved | 2025 |
| Ground | Stedelijk Sportstadion De Warande |
| Capacity | 8,000 |
| Chairman | Johan Haesevoets |
| Manager | Danny Boffin |
| League | Belgian Provincial Leagues |
| Website | https://41kfc-diest.be/ |
Koninklijke Football Club Diest is a former Belgian association football club from the town of Diest, Flemish Brabant. It played two spells in the first division: from 1961–62 to 1964–65 and from 1970–71 to 1974–75, finishing 7th in 1964.