CAIRO, Aug. 14— Amina el-Saeed, a leading feminist and the founder of Egypt's first women's magazine, died in Cairo on Sunday of cancer. She was 81.

Mrs. Saeed graduated from King Fouad I University in Cairo in 1935. She founded Egypt's first magazine for women, Hawaa, in 1954, and was its editor, writing a weekly column until her death. Throughout her 63-year career, she was a fervent proponent of women's rights, and she scolded younger women for not advancing the cause.

"If contemporary Arab women are honest," she once wrote, "they will recognize that they have not added anything to the efforts of those who have gone before and that they have not been part of any effort worth mentioning in advancing the feminist cause."

She is survived by two sons and a daughter.