RHSA may refer to:
Royal Humane Society of Australasia, an Australian charity Rosedale Heights School of the Arts, a high school in Toronto, Canada Red Hat Certification Program, Red Hat Certified System Administrator (RHCSA) is often incorrectly abbreviated as RHSA
See also Reich Security Main Office (German: Reichssicherheitshauptamt or RSHA), an organization subordinate to Heinrich Himmler