Affler is a municipality in the district of Bitburg-Prüm, in Rhineland-Palatinate, western Germany.

Affler is located in the West Eifel, south of Dasburg and above the Our, near the border with Luxembourg.

In October 1795, the French Republic annexed the Austrian Netherlands, which included the Grand-Duchy of Luxembourg. Under the French administration, the area belonged to the canton of Clervaux in the district of Diekirch, department of Forêts. In 1815, due to the resolutions of the Congress of Vienna, the former Luxembourg area east of the Sauer and Our was assigned to the Kingdom of Prussia.

The population of Affler from 1815 to 2014, based on census:

Year Population 1815 25 1835 56 1871 77 1905 80 1939 290 1950 60

Year Population 1961 60 1970 56 1987 46 1997 32 2005 30 2016 27

The community has a small chapel, built in 1887, which holds occasional services. At the end of a tunnel (in which the inhabitants of the village hid for three weeks in 1944) in the nearby forest stands a small statue of Mary. It was built in gratitude that the American bombings in September 1944 killed none of the inhabitants of Affler.