Jombang Regency is a regency of East Java, Indonesia, situated to the southwest of Surabaya. The capital of the regency is the town of Jombang. The regency has an area of 1,159.50 km2 and a population of 1,202,407 at the 2010 census and 1,318,062 at the 2020 census; the official estimate as of mid-2023 was 1,370,510. It became a regency in 1910. It was the birthplace of Abdurrahman Wahid, the 4th president of Indonesia.

Javanese is a Malayo-Polynesian language spoken by the Javanese people from the central and eastern parts of the island of Java, Indonesia. There are also pockets of Javanese speakers on the northern coast of western Java. It is the native language of more than 68 million people.