El Fassi is a surname. Notable people with the surname include:
- Abbas El Fassi (born 1940), Moroccan politician and businessman, prime minister of Morocco
- Nadir El Fassi (born 1983), French decathlete
- Farah El Fassi (born 1988), Moroccan actress
- Mohamed El Fassi (1908–1991), Moroccan politician, writer and researcher