The origin of the Municipality is unfolded from the legends and fables of the old generation. In 1578 when the head Mission of Quipayo was established, Calabanga was only a visita or barrio. At that time, the place has vast forests and swamps and an abundance of wildlife such as monkeys, wild chickens and forest lizards. Some say Calabanga derived its name from the Bicol word “Calabangan”, the plural term of “labang” or “litag”, a kind of snare for catching wild animals. Another legend says that Calabanga originated from the word “Calagbangan” meaning the wide, long and straight street spanning from the church through the poblacion, east to west, called locally as “Calabaan” or “Calacbangan”.

Calabanga became a town with 400 tributes. On July 15, 1749, it was separated from Quipayo by virtue of the approval of Don Fray Joan de Arechera, Bishop-elect of Nueva Segovia of the Commissary of the King, in the petition signed and filed by 37 Calabangueños on April 28, 1749 for the town to be conveniently administered.
There were two visitas- Visita de Cagapad and Visita de Hinarijan and 12 barrios. The barrios were San Antonio, San Vicente, Sta Catalina, Nuestra Señora de Salud, San Lucas, San Miguel, Sta. Isabel, Nuestra Señora del Carmen, San Roque, San Pablo, San Jose (now Balongay) and Belen.
Today, Calabanga is one of the Municipalities of the Province of Camarines Sur. With its rich fishing grounds and vast agricultural area, it is a major supplier of fish and other marine products and prime agricultural products in the province as well as in Metro Manila.
The literacy rate in the municipality is high at 97.5% which is attributed to the continuing efforts of the government to make education more accessible to the people. For those who will pursue college courses not offered in the Municipality of Calabanga, one has to go to colleges and universities in Naga City or in Metro Manila
The LGU of Calabanga has three government Health Centers, one at the Poblacion area and two RHUs at the western and eastern part of the municipality. Aside from the government sector, there are private medical, dental, and lying-in clinics and 7 pharmacies in the municipality. The number of health personnel is sufficient and beyond the standard as to the ratio to the population, however, facilities and equipments are still lacking.