Hjalmar-Johannes Mäe (24 October [O.S. 11 October] 1901 in Tuhala, Governorate of Estonia, Russian Empire – 10 April 1978 in Graz, Austria) was an Estonian politician.

Mäe was twice a candidate to the Riigikogu, in the 1929 Estonian parliamentary election as a Landlords' Party candidate and in the 1932 Estonian parliamentary election as a National Centre Party candidate. Later he joined the Vaps Movement. He was the Head of the Directorate of the Estonian Self-Administration, which was subordinate to Reichskommissariat Ostland, during the occupation of Estonia by Nazi Germany, and took part in the first investigation of the Nemmersdorf massacre.