| Perumal Rasu | |
| Birth Date: | 1931 11, df=yes |
| Birth Place: | Krishnagiri, Krishnagiri District, Tamil Nadu, British India |
| Nationality: | Indian |
| Known For: | Painter, Poet, Writer, Martial Artist, Spiritual Master |
| Spouse: | Mahalakshmi |
Perumal Rasu (Tamil: இரா. பெருமாள் ராசு; born 19 November 1931) is an Indian poet and a writer from Krishnagiri, Krishnagiri District, Tamil Nadu.
Perumal Rasu is also a painter, martial artist, and Spiritual master. His followers consider him a great soul (Sanskrit: Mahatma) and address him as Karumalai Siddhar (Tamil: கருமலை சித்தர், English: Saint of Krishnagiri). He is a devotee of Yogi Ramsuratkumar, popularly known as "Visiri samiyar" (Tamil: விசிறி சாமியார்).
His Maathiyosi (Tamil: மாத்தியோசி) was serialized in a popular regional weekly, Ananda Vikatan and won accolades. Owing to its huge popularity, the series was released as a book.