| Ria Ahlers | |
| Birth Date: | 20 July 1954 |
| Birth Place: | Groningen, Netherlands |
| Height: | 1.87m (06.14feet) |
| Weight: | 68kg (150lb) |
| Sport: | High jump |
| Club: | De Sperwers, Emmen |
| Show-Medals: | yes |
Maria "Ria" Ahlers (married Steenpaal) (born 20 July 1954) is a former high jumper from the Netherlands. She competed in the 1972 and 1976 Summer Olympics and finished in 16th and 12th place, respectively. Her personal best was 1.87 m (1976). She was a national champion in 1972, 1972 and 1976.