The highest point of the city is at 371 metres above sea level. The municipality dimensions are about 12.2 kilometres east-west and about 12.5 kilometres north-south.
Mayors
Elected in September 2020, the mayor of Extertal is Frank Meier.[1]
Churches and religious communities
Evangelical Reformed Church (Church of Lippe) in Bösingfeld, Mittelstrasse 33
Evangelical Reformed Church (Church of Lippe) in Almena, Kirchstrasse 1, 32699 Extertal-Almena
Evangelical Reformed Church (Church of Lippe) in Silixen, Dietrich-Bonhoeffer-Strasse 5