Oak is a municipality in the district of Old Churches ( Westerwald) in Rhineland- Palatinate. It belongs to the municipality Flammersfeld.
The municipality lies in the Westerwald between Flammersfeld and Horhausen; Neighboring municipalities are Rott in the Northwest and Upper Lahr in the southwest.
At Oak belongs to the district Gollershoben.
Oak belonged until 1806 to the County of Sayn- Hachenburg and Parish Flammersfeld. The county of Sayn- Hachenburg 1799 was fallen on the Erbweg to the princes of Nassau- Weilburg. 1806 came the two princes of Nassau in the Napoleonic Confederation of the Rhine, so that the region of 1806 belonged to the Duchy of Nassau. Because of the Congress of Vienna (1815 ) agreements the territory of the former saynischen counties of the Kingdom of Prussia was ceded.
Under the Prussian administration calibrate the mayoralty Flammersfeld was assigned to the newly built district of Old churches that belonged from 1822 to the Rhine province.
The development of the population of the municipality of oaks, the values from 1871 to 1987 based on population censuses:
The local council in Oak consists of twelve council members, who were elected at the municipal election held on 7 June 2009 by majority vote, and the honorary mayor as chairman.
List of cultural monuments in oaks (Westerwald )