The town is named after the town of
Almadén in
Cuidad Real Province, Spain, which is known for its mercury mine. The mineral deposits in Queensland's Almaden are
tripolite (
diatomite). On 1 January 1909 it became Almaden State School. It closed on 12 December 1997. It was at 22 Almaden Second Street (). It is now a tourist park. Ootann Provisional School opened on 23 May 1929 and closed circa 1933. == Demographics ==