Clemence of Austria (in German: Klementia) (1262 – February 1293, or 1295) was a daughter of King Rudolph I of Germany and Gertrude of Hohenberg.

On 8 January 1281, Clemence married Charles Martel of Anjou.

Charles Martel was set up by Pope Nicholas IV and the ecclesiastical party as the titular King of Hungary (1290–1295) as successor of his maternal uncle, the childless Ladislaus IV of Hungary against whom the Pope had already earlier declared a crusade.

Charles Martel was, however, successful in asserting his claims in parts of Croatia, a kingdom then in personal union with Hungary.

Charles Martel died young in Naples, during the lifetime of his parents.