Total land area of the diocese 3761.2 square kilometers. Simdega is located in the south-western part of the state of Jharkhand. Simdega is surrounded by Gumla district in the North, Khunti and West Singhbhum in the east, Chhattisgarh state in the west and Orissa state in the South. This district was carved out from erstwhile Gumla district on April 30, 2001.
Among the 648,515 people in the diocesan territory in 2017, Munda, Oraons, and Kharias, Badaiks, Muslims and Hindus are the ethnic groups.
Languages used in the diocesan territory are Hindi, Mundari, Oraon, Kharia, and Nagpuria.
Roads are being used for transportation in the area.
Per capita income in the diocesan territory: Rs. 23 361 or USD522 as of December 2010.
Major industries: None; Trade and agriculture: Paddy, Maize, Groundnut, and Black beans.
The literacy rate is Female: 23 percent, Male: 45 percent