Villmar lies in the Lahn River valley between the Westerwald and the Taunus, some ten kilometres east of Limburg.

In the southeast rises the likewise more thickly wooded northwestern part of the Eastern Hintertaunus (or Langhecker Lahntaunus) with the Villmarer Galgenberg (277 m) as its westernmost outpost, visible from a great distance.

Lying in the geologically significant Lahnmulde ("Lahn Hollow"), Villmar is rich in mineral deposits from the Middle Devonian period: silver, iron ore, slate, and limestone.

In addition to the reef limestone, the extensively mined, mostly greenish diabase tuff was used for many purposes (for instance, ringwall, parish house and most older buildings' cellars.)

Of particular importance in this is the abbot's right, already falsely appended to the donation document, to employ a secular Schutzvogt, which amounted to a noble title.

A list was drawn up of places owing tithes, among them the current constituent communities of Seelbach, Aumenau and Weyer.

It is believed that in the same year, a falsification of the original document, backdated to 1054, appeared, which dealt with the Vogt rights as well as the parish's extent, and thereby with tithes.

In 1166 a Trier ministerial family named “von Villmar”, who had apparently moved to the community not long before this, was living here.

As of the 13th century, the historical record also shows Trier's ambition to wrest ascendancy over Villmar from the local overlords.

The dispute over the territory's overlordship was settled in the 16th century when, with Saint Matthew's Abbey's (Abtei St. Matthias) consent in 1565, the Villmar Vogt rights held by the Isenburg-Büdingens and the Solms-Münzenbergs were sold to the Electorate of Trier for 14,000 Frankfurt guilders.

This also had consequences for religious affiliation: while Villmar (and Arfurt) remained uninfluenced by the Reformation, the centres of Seelbach, Falkenbach, Aumenau and Weyer in the Runkel domain were converted, first in 1562 to Lutheranism, and as of 1587 and 1588 to Calvinism.

After the Electorate's and the Holy Roman Empire's fall between 1803 and 1806, Villmar passed in 1806 to the newly created Duchy of Nassau.

Inside is found rich Late Baroque décor (1760–64) from the Hadamar school (Johann Thüringer, Jakob Wies) as well as works made in the 18th and 19th centuries from local Lahn marble.

A Celebration altar and an ambo made of French lime sand brick were carved by sculptor Walter Schmitt (Villmar) in the 1980s and 1990s.

The last quarrying in Villmar was done in 1989 for the reconstruction of the high altar at the Jesuitenkirche Mannheim, which had been heavily damaged in the Second World War.

The great majority of workers earns its livelihood in Limburg an der Lahn, Wetzlar, Gießen and, given the favourable transport connections, the Frankfurt Rhine Main Region.