This is a list of periodic comets that were numbered by the Minor Planet Center after having been observed on at least two occasions. Their orbital periods vary from 3.2 to 366 years. As of June 2021 there are 421 numbered comets (1P–421P), most of them being members of the Jupiter-family (JFC). There are also 30 Encke-type comets (ETCs), 14 Halley-type comets (HTCs), 5 Chiron-type comets (CTCs), and one long-period comet (i.e. ). About a third of these bodies are also near-Earth comets (NECs). In addition, 8 numbered comets are principally classified as minor planets – five main-belt comets, two centaurs (CEN), and one Apollo asteroid – and display characteristics of both an asteroid and a comet.