Guémené-Penfao (French pronunciation: [ɡemne pɛ̃fo] ; Gallo: Gemenae, Breton: Gwenvenez-Penfaou) is a commune in the Loire-Atlantique department in western France, north of Nantes. The commune is widespread and includes the former communes of Beslé-sur-Vilaine and Guénouvry.

Its name comes from the Breton language: "gwen" (white), "menez" (hill, mountain), "pen" (head), and "faou" (beech tree). The main economic activity is agriculture.

Historical population

Year Pop. ±% p.a. 1793 3,383 —     1800 3,585 +0.83% 1806 3,436 −0.71% 1821 3,634 +0.37% 1831 3,798 +0.44% 1841 4,013 +0.55% 1846 4,328 +1.52% 1851 4,630 +1.36% 1856 4,679 +0.21% 1861 4,977 +1.24% 1866 5,637 +2.52% 1872 5,923 +0.83% 1876 6,167 +1.01% 1881 6,566 +1.26% 1886 6,766 +0.60% 1891 6,812 +0.14% 1896 6,765 −0.14% 1901 6,738 −0.08%	Year Pop. ±% p.a. 1906 6,762 +0.07% 1911 6,497 −0.80% 1921 5,982 −0.82% 1926 5,922 −0.20% 1931 5,697 −0.77% 1936 5,608 −0.31% 1946 5,527 −0.15% 1954 5,331 −0.45% 1962 5,189 −0.34% 1968 4,977 −0.69% 1975 4,590 −1.15% 1982 4,476 −0.36% 1990 4,464 −0.03% 1999 4,572 +0.27% 2007 4,920 +0.92% 2012 5,209 +1.15% 2017 5,200 −0.03%
Source: EHESS and INSEE (1968-2017)

• Communes of the Loire-Atlantique department