The chief minister made the demand at the Gandhi Maidan in Patna.
He said that the pace of Bihar's economic development will increase if it got a special category status.
Nitish Kumar said that Bihar was lagging behind on several fronts.
He said that without New Delhi's help, it would take nearly 25 years for Bihar to touch the national average of economic growth.
"Bihar's per capita income and investment is lowest in the country. Bihar lags behind in all human resource indexes," he said.