Mariahu P. G. College is situated in the southern part of Jaunpur district of the state of Uttar Pradesh. Mariahu is a Tehsil, about 20 kilometres from the district headquarters. The region is well irrigated by the rivers Sai on the north and Basuhi in the south. The college is located right in front of Mariahu Railway station that connects Allahabad to Jaunpur. By railways the place is well connected to Allahabad, Mumbai, New Delhi and other major cities of India. The highway that connects Lumbini near Nepal border to Duddhi of hilly Vindhya region is just a stone’s throw away from the college. By road the place is well connected to cities of the region including Jaunpur (20 kms), Mirzapur (50 kms), Varanasi (45 kms) and Allahabad (100 kms) . The nearest airport terminal – Lal Bahadur Shastri Airport at Babatpur, Varanasi is just 40 kilometres from the college.
The Geo-coordinates of the college are 25.61280 degree North latitude and 82.62790 degree East longitude.