| Mas Isman | |
| Birth Date: | 1 January 1924 |
| Birth Place: | Bondowoso, East Java |
| Death Place: |  Surabaya, East Java |
| Allegiance: | Indonesia |
| Rank: | Mayor General |
| Branch: | Indonesian Army |
| Battles: | Indonesian National Revolution |
| Awards: | National Hero of Indonesia |
Mas Isman (1 January 1924 –12 December 1982) was an Indonesian freedom fighter in East Java when it was part of the Dutch East Indies. He received a National Hero of Indonesia award from President Joko Widodo on 5 November 2015.[1]
Mas Isman was the father of Hayono Isman, Indonesia's Minister of Youth and Sports Affairs.