| Siamak Yasemi | |
| Birth Date: | June 1925 |
| Birth Place: | Tehran, Iran |
| Death Place: | Tehran, Iran |
| Native Name: | سیامک یاسمی |
| Native Name Lang: | Fa |
| Pronunciation: | See-yah-mak Yah-sam-ee |
| Nationality: | Iranian |
| Occupation: | Film director, screenwriter |
| Yearsactive: | 1953–1976 |
| Spouse: | Firouzeh Dowlatshahi |
| Children: | Saghi Yasami, Saghar Yasami, Sharyar Yasami |
| Father: | Gholamreza Rashid-Yasemi |
Siamak Yasemi (fa|سیامک یاسمی; June 1925 – 31 May 1994) was an Iranian director, screenwriter, producer, and poet. He was the son of Rashid Yasemi. He is known for revolutionizing the cinematic industry in Iran and is considered one of the most successful film makers in Iran.