KRL Commuterline, commonly known as Greater Jakarta Commuter rail, or KRL Commuter Line Jabodetabek is a commuter rail system for Greater Jakarta in Indonesia. It was previously known as KRL Jabodetabek. It is operated by KAI Commuter (KAIC/KCI), a subsidiary of the Indonesian national railway company PT Kereta Api Indonesia (KAI). The rail system uses rolling stock of rapid transit standard and operates at high frequency with a minimum headway. In 2019, the average number of Commuterline users per day reaches average of 1.04 million, with the record of the highest number of users served in a day being 1,154,080.

The Jakarta metropolitan area or Greater Jakarta, known locally as Jabodetabekpunjur is the most populous megapolitan area in Indonesia. It includes the national capital as well as five satellite cities and three complete regencies. The original term "Jabotabek" dated from the late 1970s and was revised to "Jabodetabek" in 1999 when "De" was inserted into the name following its formation. The term "Jabodetabekjur" or "Jabodetabekpunjur" was legalised on the Presidential Regulation Number 54 of 2008, and then the name "Jabodetabekpunjur" is officially used.