Ratuwamai is a municipality and rural town situated in south-eastern Tarai in Morang district and Koshi Province of Nepal.

This municipality was formed merging six village development committee i.e. Sijuwa, Itahara, Jhurkiya, Mahadeva, Govindapur (Ward No.

Sombare, Itahara, Laxmichock, Damravitta, Sijuwa, Sauntha, Shanichare, Govindapur, Kalyanpur and Jhurkiya ,Mahadewa,Mirchadangi,chhalgachi ,Pidhali are the most developing places in the Municipality.

Of these, 40.8% spoke Nepali, 19.6% Maithili, 9.8% Rajbanshi, 8.4% Tajpuriya, 6.6% Urdu, 4.5% Santali, 1.8% Limbu, 1.4% Ganagai, 1.0% Newar, 1.0% Rai, 0.9% Bengali, 0.9% Tamang, 0.8% Tharu, 0.5% Magar, 0.2% Bhojpuri, 0.2% Dhimal, 0.2% Hindi, 0.2% Majhi, 0.1% Bantawa, 0.1% Gurung, 0.1% Sampang, 0.1% Sunuwar, 0.1% Yakkha and 0.3% other languages as their first language.

[2] In terms of ethnicity/caste, 15.9% were Hill Brahmin, 15.2% Chhetri, 8.5% Tajpuriya, 7.8% Musalman, 6.0% Gangai, 4.6% Rajbanshi, 4.6% Satar/Santal, 2.4% Newar, 2.2% Limbu, 2.2% Musahar, 2.0% Teli, 1.9% Sanyasi/Dasnami, 1.7% Rai, 1.6% other Terai, 1.6% Yadav, 1.5% Damai/Dholi, 1.5% Majhi, 1.2% Tamang, 1.1% Amat, 1.0% Kami, 1.0% Kewat, 1.0% Tatma/Tatwa, 0.9% Mallaha, 0.9% Tharu, 0.8% Badhaee, 0.8% Hajam/Thakur, 0.8% Magar, 0.8% Nuniya, 0.6% Sudhi, 0.5% Baraee, 0.5% Dhanuk, 0.5% Halwai, 0.5% Sarki, 0.4% Chamar/Harijan/Ram, 0.4% Dusadh/Paswan/Pasi, 0.4% Gharti/Bhujel, 0.3% Bantar/Sardar, 0.3% Brahmu/Baramo, 0.3% Gurung, 0.3% Koiri/Kushwaha, 0.3% Kumal, 0.3% Sonar, 0.2% Dhimal, 0.2% Kathabaniyan, 0.2% Kayastha, 0.2% Lohar, 0.1% Bengali, 0.1% Bin, 0.1% Terai Brahmin, 0.1% other Dalit, 0.1% Danuwar, 0.1% Gaderi/Bhedihar, 0.1% other Janajati, 0.1% Kahar, 0.1% Kalwar, 0.1% Kamar, 0.1% Khawas, 0.1% Kumhar, 0.1% Kurmi, 0.1% Rajput, 0.1% Sunuwar, 0.1% Thakuri, 0.1% Yakkha and 0.5% others.