Ellezelles (; ; ; ) is a municipality of Wallonia located in the province of Hainaut, Belgium.
It consists of the following districts: Ellezelles, Lahamaide, and Wodecq. Bordering Flanders, the town is home to a minority of Dutch-speakers.
The village archives contain a document "attesting" to the birth of Hercule Poirot on 1 April 1850.
thumb|none|200px|"Wild cat" windmill (1751)
Notable people
- Lamoral, Count of Egmont, Prince of Gavere (1522 in La Hamaide near Ellezelles – executed in 1568) a general and statesman in the Spanish Netherlands just before the start of the Eighty Years' War.
- Richard Ely (born 1974 in Ellezelles) a Belgian writer, journalist and ethnobotanist.