Pune is also known as Poona. The diocese is spread over 49, 678 square kilometers covering the civil districts of Pune, Sangli, Satara and Solapur and the parish of Kolhapur. It is an educational hub.
The main languages spoken are English, Hindi, Konkani, Malayalam, Marathi, Telugu and Tamil.
Poona was erected into a Vicariate Apostolic by dismemberment from Bombay on March 8, 1854, and entrusted to the society of Jesus. The Vicar Apostolic of Bombay remained Administrator till the Hierarchy was established in 1886. Rt.Rev.Bernard Bieder-Linden SJ was appointed its first Bishop.
Climate is pleasant with temperatures reaching up to 35 degrees Celsius in summer. Winters are not usually cold.