The municipality lies in the Western Palatinate at a broadening of the Glan valley near the mouths of two brooks that empty into the Glan, the Rödelbach from the left and the Dorfbach from the right, roughly 210 m above sea level, while the settled parts of the flanking slopes reach some 300 m above sea level.

The houses in the original Rehweiler, too, cluster around a crossroads, this one formed by Kuselbergstraße and Quirnbacher Straße running north-south, and Rödelbachstraße and Glanstraße on the river's left bank.

While Kuselbergstraße towards its north end climbs up the mountain slope, branching off it in a straight line down in the valley is Eisenbacher-Straße.

[5] Bearing witness to early human habitation in what is now Rehweiler is an archaeological find made in 1938: While destroying a barrow from La Tène times (about 400 BC) inside the Reichsarbeitsdienst camp (now SpVgg Rehweiler-Matzenbach's sporting ground), a human skeleton, a narrow-necked bottle and four heavily oxidized bronze armrings were found by the resident Nazis.

These Gallo-Roman finds were stored by Charles II August, Duke of Zweibrücken in his cabinet of rarities at Karlsberg Castle, his palatial country seat near Homburg, now in the Saarland.

[6] The villages of Leidenstall, Reichartsweiler and Rehweiler may have arisen in the expansion phase of the later Frankish colonization during the 10th century, but it is impossible to pinpoint exact founding dates.

In 1112, Count Emich's son, named Gerlach, from the Nahegau took over several Vogteien (security functions) over various lands held by ecclesiastical lordships (Mainz, Worms, Verdun, Reims), and out of these, together with some lands already under his own ownership in the Nahegau, he founded the so-called County of Veldenz, named after the Episcopal-Verdun holding around Schloss Veldenz on the river Moselle.

From this document the reader learns that Count Heinrich I of Veldenz, the founder of the newer comital line, sold the villages of Ysenbach (Eisenbach) and Leidenstall to the Count of Zweibrücken, and also that he ordered the Schultheiß in Kusel to pay interest on this in the amount of seven solidi in Trier funds to the provost at the Remigiusberg.

The exact year when this pledge was made is unknown, although it is, of course, known that it happened before 1347, when Georg I, perhaps, as the Landvogt of Speyer, the mightiest of all the Counts of Veldenz, died.

Thus, Rehweiler and the two now vanished villages still lay within the Remigiusland, in the Oberamt of Lichtenberg and the Schultheißerei of Pfeffelbach, but Reichartsweiler found itself in the Amt of Reichenbach.

According to the 1609 Church Visitation protocols of the Amt of Baumholder, 136 persons – 91 in Reichartsweiler and 45 in Rehweiler – were living in the united village at that time.

Migration to the area helped raise the population levels, but French King Louis XIV's wars of conquest brought new hardship.

The Mayoralty of Quirnbach lasted until administrative restructuring in Rhineland-Palatinate in 1972, when it was finally dissolved, and Rehweiler was grouped into the newly founded Verbandsgemeinde of Glan-Münchweiler.

[10][11] Until the early 20th century, Rehweiler's inhabitants earned their living almost exclusively at agriculture, which then began to lose importance, finally usually only being pursued as a secondary occupation.

Even before the First World War, many villagers had to earn their livelihoods as workers at stone quarries, Saarland mines and factories.

Many members of the workforce today commute to work, making Rehweiler mainly a residential community for people in the most varied of occupations.

It was mainly newcomers who settled in the village who strongly boosted the population in the years leading up to 1688, but it shrank again in the wake of French King Louis XIV's wars of conquest.

There was another period of growth between 1900 and 1939, and then after the Second World War came ethnic Germans driven out of Germany's former eastern territories, looking for new homes.

Even then, a building was still standing near the village's location (but within Etschberg's limits), the so-called Huberhaus from which watch was kept over the surrounding forest.

When Duke Ludwig II of Zweibrücken converted to Martin Luther’s new teaching, the inhabitants of these villages, under the principle of cuius regio, eius religio, had to do likewise and adopt the Lutheran faith.

After the Thirty Years' War, freedom of religion prevailed, and that led, during the occupation by King Louis XIV's troops, to the Catholic faith being once again more strongly supported.

The bridge is the one spanning the river Glan (the water in base), and symbolizes the link between the two formerly separate villages of Reichartsweiler and Rehweiler.

The tinctures, sable and Or (black and gold), are those borne by the House of Wittelsbach, which held sway in both the Palatinate and the Duchy of Palatinate-Zweibrücken, the two states that also once divided the two centres between themselves.

Otto Hupp’s book Die Ortswappen und Gemeindesiegel der Rheinpfalz (“Municipal Arms and Seals of the Rhenish Palatinate”) published in 1928 displays an unapproved coat of arms for Rehweiler that might be described as “Argent a roebuck springing gules unguled Or” (that is, a red roebuck with gold hooves rearing on its hindlegs on a silver background).

In 1790, the teacher Johann Nickel Schmidt was teaching in Rehweiler, a job that he kept through French Revolutionary and Napoleonic times.

In the Kingdom of Bavaria (where Rehweiler found itself after the Congress of Vienna), the government undertook from the beginning to bring to life a new school structure.

Horstmann was then transferred to Erpolzheim and followed in Rehweiler by Jacob Philipp Schwarm, who for seven years had taught in Haschbach am Remigiusberg.

About 1870, Rehweiler parents were no longer satisfied with Schwarm, who after teaching for 35 years showed obvious signs of bodily and mental weakness.

With a yearly salary of 200 guilders, he was pensioned off, and after interviewing several applicants, municipal council chose Ludwig Neumüller as his successor.

[24] Running through the village is Bundesstraße 423 on the Glan's right bank and parallel thereto, which leads from Altenglan by way of Glan-Münchweiler and Homburg to the French border.