For Administration and Policy, you may contact :

Office of The Registrar General and Census Commissioner, India
Janganana Bhawan, 2/A Mansingh Road, New Delhi -110011 (INDIA)
Contact No: +91-11-23388132
E-mail ID: rgi[dot]rgi[at]gov[dot]in

Nodal Public Grievance Officer :

Office of The Registrar General and Census Commissioner, India
Sh. Sunil Kumar, Addl. Registrar General
Tower-B Janganana Bhawan,
2/A Mansingh Road, New Delhi -110011 (INDIA)
Contact No: +91-11-21410410
E-mail ID: sunil[dot]kumar7[at]gov[dot]in
The grievance can also be lodged on-line on the following link : https://pgportal.gov.in/

For Query related to Data, you may contact :

ORGI - Data Dissemination Unit (DDU) New Delhi
Janganana Bhawan, 2/A, Mansingh Road, New Delhi - 110011.
Contact No: +91-011-23388132
E-mail ID: ddu[dot]rgi[at]gov[dot]in

For suggestion / problem with the designing / working of this site and further improvement, you may contact:

National Data Center
Office Of Registrar General,India,Ministry Of Home Affairs
Block-III, 8th Floor, Delhi IT Park, Shastri Park, Delhi – 110053
Contact No(s): +91-11-22170801,22170802,22170803
E-mail ID: websupport[dot]rgi[at]gov[dot]in