Cerfontaine (; ) is a municipality of Wallonia located in the province of Namur, Belgium.
On January 1, 2006, Cerfontaine had a total population of 4,546. The total area is 83.45 km<sup>2</sup> which gives a population density of 54 inhabitants per km<sup>2</sup>.
The municipality consists of the following districts: Cerfontaine, Daussois, Senzeille, Silenrieux, Soumoy, and Villers-Deux-ÃÂglises.
The Eau d'Heure lakes are situated partly in this municipality and partly in neighbouring Froidchapelle.
The CERFONTAINE post-office opened on 25 February 1860. It used a Distribution code 98 with vertical bars (before 1864), and 75 with points before 1874. The SILENRIEUX post-office opened on 9 December 1899; SENZEILLES on 21 August 1906.
Code 5630 since at least 1990.
Postal codes in 1969 (before the merger of municipalities in 1977): - 6355 Villers-Deux-ÃÂglises - 6444 Silenrieux - 6445 Daussois - 6450 Cerfontaine - 6451 Soumoy - 6452 Senzeille.