Bajjika or Vajjika (Maithili:বজ্জিকা Hindiवज्जिका) is an Indian language spoken by about eleven million people, mainly in the western part of Muzaffarpur District, Vaishali, East Champaran and West Champaran districts of Bihar and about eight hundred thousand people in the adjacent regions of Nepal.

The language is widely spoken in the Western part of Mithila region. It is similar to Maithili and Angika. Sources such as CIIS and The Ethnologue regard it as a dialect of Maithili language. However, in the 21st century, there have been claims for an independent status for the language within the same family of Bihari languages.

"Lakshmi Elthin Hammar Angna (2009)" is the first formal feature film in Bajjika. Sajan Aiha Doli le ke came after that. Many Bajjika films have been made before and after that. But, they were categorized as Maithili Films, as no clear border exists between Bajjika Maithili and Standard Maithili.

Surendra Mohan Prasad, Yogendra Rai, Dr. Yogendra Sinha, Dr. Rameshwar Prasad, Nirmal Milind, Chandra Prakash, Chandra Kishore etc. are/were the famous writers of Bajjika.

Sharda Sinha (born October 9, 1952) is a folk-singer and music teacher from Samastipur, Bihar. .

Sharda Sinha sings Maithili and Bhojpuri songs, has received Padma Shri for her contribution to music. Prayag Sangeet Samiti organised Basant Mahotsava at Prayag where Padma Shri Sharda Sinha presented numerous songs based on the theme of spring season, where the advent of spring was narrated through folk songs. She regularly performs during Durga Puja festivities. She performed when the Prime Minister of Mauritius Navin Ramgoolam came to, Bihar. She has sung in many movies such as Maine Pyar Kiya and Hum Aapke Hain Kaun and has also produced several music albums such as Dulhin, Pirittiya and Mehndi. Bihar 'kokila' Sharda Sinha performed at Pragati Maidan in the Bihar Utsav, 2010, New Delhi. Sinha started the programme with her patriotic song "Maiya bharti pukarela jawan babua tora hathawa mein deshwa ke shaan babuwa". Her other songs, included "Paniya ke jahaj se paltaniya bani ahiya piya lele ahiya ho sindurwa Bengal Ke," "Kahe to se sajani hamaar jogiya," "Sutal chaliya baba ke bhawanwa," "Sun ho pardesia," "Sasuji se lutri," "Apna sajaniya ke" and "Dulhin dhire dhire chalio."