Dan (Hebrew: דָּן), and older name Laish, is an ancient city mentioned in the Hebrew Bible, described as the northernmost city of the Kingdom of Israel, and belonging to the tribe of Dan, its namesake. It was later the site of a royal sanctuary built by Jeroboam.

The city is identified with a tell located in Upper Galilee, northern Israel, known as Tel Dan (תֵּל דָּן‎) in Hebrew and Tell el-Qadi ("Mound of the Judge") in Arabic, a popular translation of the ancient Hebrew name. The site was occupied continuously from the Early Bronze Age through the Iron Age II, the time of the Kingdom of Israel. While evidence suggests a period of abandonment during the Persian era, it was later rebuilt as a Hellenistic city with a notable shrine.

The Hebrew Bible states that prior to its conquest by the tribe of Dan the site was known as Laish with variant spellings within the Books of Joshua, Judges and Isaiah. In Joshua 19:47 it is called Leshem. Isaiah 10:30 has the alternative name Laishah "Lioness" in a number of translations.

Rabbinic works, and writers like Philostorgius, Theodoret, Benjamin of Tudela and Samuel ben Samson, all incorrectly identified Dan or Laish, with Banias (Paneas). Eusebius of Caesarea more accurately places Dan/Laish in the vicinity of Paneas at the fourth mile on the route to Tyre.

The Arab name of the archaeological site, Tell el-Qadi, meaning "the tell of the judge," plays on the distinction between Arabic "din" and Hebrew "dan," offering a popular translation of the ancient Hebrew name. 19th century Swiss traveler Johann Ludwig Burckhardt identified the source of the Jordan River having the name "Dhan" (Arabic: ضان) in his travelogue published posthumously in 1822. The American naval officer William F. Lynch was the first to identify Tell el-Qadi as the site of the ancient city of Dan in 1849. Three years later, Edward Robinson made the same identification, and this identification is now securely accepted.

Tel Dan is the modern Israeli name for the site, based on the original Biblical name.

Dan is situated in the area known as the Galilee Panhandle, which is a part of Upper Galilee. To the west is the southern part of Mount Lebanon; to the east and north are the Hermon mountains. Melting snow from the Hermon mountains provides the majority of the water of the Jordan River, and passes through Dan, making the immediate area highly fertile. The lush vegetation that results makes the area around Dan seem somewhat out of place in the otherwise arid region around it. Due to its location close to the border with Syria and Lebanon at the far north of the territory which fell under the British Mandate of Palestine, the site has a long and often bitterly contested modern history, most recently during the 1967 Six-Day War.

According to the Book of Judges, prior to the Tribe of Dan occupying the land, the town was known as Laish (Judges 18:7, 14, 27–29), meaning lion, or rather lioness. Joshua 19:47, although telling the same story as Judges 18, names the city as Leshem, which makes the researchers consider it as being the same place.