Diest is a city and municipality located in the Belgian province of Flemish Brabant. The municipality comprises the city of Diest proper and the towns of Deurne, Kaggevinne, Molenstede, Schaffen en Webbekom. On January 1, 2006, Diest had a total population of 22,845. The total area is 58.20 km² which gives a population density of 393 inhabitants per km².
- Saint John Berchmans (1599-1621), Jesuit seminarian, born in Diest.
- Timmy Simons, footballer, played 44 times for the Belgian national team (as of May 30th, 2006)
- Baron Bob Stouthuysen (b. 10 March 1929), businessman.
- Omer Vanaudenhove (1913-1994), liberal politician
- Peter van Diest, writer, probable author of the play Elckerlijc
- Liliane Saint-Pierre, singer.