Herman Dalmatin or Herman of Carinthia (c. 1100 – c. 1160), also known in Latin as Sclavus Dalmata, Secundus, was a philosopher, astronomer, astrologer, mathematician, translator and author.

Among Adelard of Bath, John of Seville, Gerard of Cremona (1114–1187) and Plato of Tivoli (1134–1145) Herman is the most important translator of Arabic astronomical works in 12th century and popularizer of Arabic culture in Europe.

The influence of his translations on the development of medieval European astronomy is especially large.