Kochas is a town and corresponding community development block in Rohtas district of Bihar state, India. It is located at an elevation of 69 m above MSL. National Highway 30 passes through Kochas. The nearest airport is Varanasi Airport (105 KM).The most famous cultural event of Kochas is Krishn Lila unfortunately it is known and famous as "Kans Lila". Beside Krishn Lila other famous cultural activities are Chhath Puja, Durga Puja and other religious functions. Kochas's Surya Mandir sun temple is identity of Kochas. It is situated in center of a Pond "Pokhara". It was established on 1 October (SS). As of 2011, the population of Kochas was 21,597, in 3,287 households, making it the largest village in Rohtas district. The entire block had a population of 170,025. The nearest major city is Sasaram, the Rohtas district headquarters. Demographics Kochas is an entirely rural block, with no major urban centres. The sex ratio of Kochas block in 2011 was 916, slightly below the overall Rohtas district average of 918 (921 for rural areas). The sex ratio was slightly higher in the 0-6 age group at the time, with 922 females for every 1000 males. Members of scheduled castes made up 18.2% of the block population, comparable to the district average of 18.57%, and scheduled tribes made up 0.36% of the block's residents. The literacy rate of Kochas block was 75.24%, somewhat higher than the Rohtas district rate of 73.37%. Literacy was higher in men than in women, with 83.82% of men but only 65.87% of women able to read and write. The corresponding 17.95% gap was lower than the overall Rohtas district literacy gender gap of 19.91%. The population of the village of Kochas in 2011 was 21,597, of whom 3,681 (17.04%) were in the 0-6 age group. 52.71% of the population was male (11,384) and 48.29% was female (10,213). The village literacy rate was 64.95%. Economy The common occupation in the area are related to agriculture. Since paddy is main crop of area so Rice Processing Units commonly known as rice mills developed in surrounding area. After the economic reforms of 1991 Kochas gradually become a small business hub having shops of agricultural equipment/Tools.This small town fulfill the day to day requirements of the people living in villages in surrounding area. There are multiple bank branches available such as State Bank of India, Punjab National Bank, Bank Of India,