As can still be recognized today in the construction technique of the older parts of both Steinbach am Glan's centres, a great number of the villagers in the 19th century made their living from agriculture. There were also, however, many who worked the coal pits in Steinbach and other mines farther afield. In the earlier half of the 20th century, many diamond cutters lived in both villages. Considerable, too, was the Jewish share of the population, many of whom were in trade and crafts, including the diamond cutting. The number of Jewish families shrank in the latter half of the 19th century as many Jews emigrated to the United States. By 1933, only 35 Jews lived in the village, and under the pressure of Adolf Hitler’s Nazi régime, emigration accelerated. Four Jewish residents who had remained were deported to the Gurs internment camp in the south of France in 1940, whence they were later transported to Auschwitz; they did not survive the Holocaust. A sharp rise in the population figures can be noted between 1800 and the middle of the 19th century, with the population doubling. At the turn of the 20th century, there was a drop in population as people emigrated or moved on. The figures, though, began to rise again, even before the First World War, and further rises can be noted down to the present day. Frutzweiler, too, saw particularly strong population growth in the early 19th century. About 1835, the population peaked, only to fall off steadily for many years afterward, rising again only after the Second World War. The Jewish share of the population was not as high in Frutzweiler as it was in Steinbach. Nowadays, no Jews live in either centre anymore. In the course of the 20th century, ever fewer villagers earned their livelihood at agriculture, until now, this endeavour plays only a very minor role in the municipality’s economy. Today’s municipality of Steinbach am Glan is mainly a residential community for commuters.