Deo is located 10 km to the southeast of District Administrative Aurangabad Bihar.

[6] Deo is located at 24°23′N 84°16′E / 24.39°N 84.26°E / 24.39; 84.26[7] It has an average elevation of 89 metres (291 feet).

Deo has a road network providing connectivity with the state of Bihar and other parts of the country.

The Grand Trunk Road from Kolkata to Delhi passes some 4 km from Deo.

This road is known as National Highway 19 (before 2010, National Highway 2)[10] The Deo Sun Temple of Deo is a Hindu temple dedicated to the solar deity Surya located at Deo, Bihar Aurangabad district, Bihar, India.