Of the rest of the land, 6.9% is settled (buildings or roads) and the remainder (0.4%) is non-productive (rivers or lakes).

[4] The blazon of the municipal coat of arms is Gules a Ploughshare Argent voided in Cross pattee.

Of the foreign population, (as of 2008[update]), 38.5% are from Germany, 15.5% are from Italy, 1.6% are from Croatia, 18.7% are from Serbia, 4.8% are from Macedonia, and 20.9% are from another country.

[6] There are two official border crossings into Germany in the municipality - one in Zollstrasse, Osterfingen with Jestetten in Waldshut district, Baden-Württemberg and one in Löchlistrasse, Wilchingen, with Weisweil.

It is located on the standard gauge High Rhine Railway run by Deutsche Bahn.

The wettest month is August during which time Wilchingen receives an average of 101 mm (4.0 in) of rain or snow.

The driest month of the year is September with an average of 65 mm (2.6 in) of precipitation over 11 days.