Kato Olympos (, lit. 'Lower Olympos') is a municipal unit in the Tempi municipality, within the regional unit of Larissa, in the historical and administrative region of Thessaly, Greece. Kato Olympos has, as of 2011, a Population 3,496 inhabitants. The municipal unit has an area of . The seat of the municipal unit is located in Pyrgetos, the largest of its four 'Local Communities' ():