| Country: | England |
| Official Name: | Steep Marsh |
| Coordinates: | 51.0304°N -0.9384°W |
| Shire District: | East Hampshire |
| Shire County: | Hampshire |
| Region: | South East England |
| Post Town: | PETERSFIELD |
| Postcode Area: | GU |
| Postcode District: | GU32 2 |
| Dial Code: | 01730 |
| Os Grid Reference: | SU7454226202 |
Steep Marsh is a small village in the civil parish of Steep situated in the South Downs Area of Outstanding Natural Beauty in the East Hampshire district of Hampshire, England. Its nearest town is Petersfield, which lies approximately 2 miles (3.2 km) south from the village.