Razlog (Bulgarian: Разлог) is a town and ski resort in the Blagoevgrad Province in southwestern Bulgaria. It is situated in the Razlog Valley and was first mentioned during the reign of Byzantine emperor Basil II.
During his 1894–1896 trip in the region of Macedonia, Bulgarian geographer Vasil Kanchov visited Razlog (then known as Мехомия, Mehomia) and reported that it numbered 820 households, of which 500 of Eastern Orthodox Bulgarians, 300 of Muslim Bulgarians (Pomaks), 16 of Protestant Bulgarians and 5 of Eastern Orthodox Aromanians, for a total population of around 4,620. According to the same author's 1900 study on the population of Macedonia, Razlog was populated by 4,970 people, of which 3,200 Christian Bulgarians, 1,460 Muslim Bulgarians, 80 Turks, 200 Roma and 30 Aromanians.
The town's population actively participated in the Kresna-Razlog and Ilinden-Preobrazhenie Uprising, Razlog, which was part of Serez sanjak in Selanik vilayet as "Razlık", itself being liberated from Ottoman rule in 1912. Razlog has developed as a centre of winter tourism in the 1990s and 2000s owing to its favourable position in the vicinity of the Pirin, Rila and Rhodope Mountains.