Almoster only takes up 5,88km2. It is located in the last foothills of the Prades Mountains, below Mount d'en Cama. The township has a long and narrow shape and borders with La Selva del Camp to the north-east and east, with L'Aleixar to the north-east, with Castellvell to the south-east and with Reus to the south. The territory is drained by the gullies of La Llengudera and Picarany and also by the torrent of Almoster.

Nowadays our agriculture is mostly irrigated, but our traditional growings have always been hazelnut, olive and carob. The land is fairly parcelled and mostly cultivated by its owners themselves. There is not much industrial activity since a brick-field was shut close and the four quarries in town were left inoperative.