The municipality is made up of the town of Lenzkirch (3341 inhabitants, including about 50 in the adjacent village of Grünwald) and the villages of Saig (812 inhabitants), Kappel (785), and Raitenbuch (152).
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Lenzkirch is on the Black Forest plateau, in the valley of the river Haslach, which near the south east border of the municipality merges with the Gutach to become the Wutach.