In 2001, the town of Groot-Ammers had 2822 inhabitants. The built-up area of the town was 0.56 km², and contained 1059 residences. The statistical area "Groot-Ammers", which also can include the surrounding countryside, has a population of around 3100.
Willem Frederik of Nassau bought the barony of Liesvelt in 1636.
In modern times the barony of Liesvelt became the municipality of Groot-Ammers. In 1986 Groot-Ammers and bordering municipalities aggregated to form the municipality of Liesveld.