Tel Aviv-Yafo, usually referred to as just Tel Aviv, is the most populous city in the Gush Dan metropolitan area of Israel. Located on the Israeli Mediterranean coastline and with a population of 474,530, it is the economic and technological center of the country. If East Jerusalem is considered part of Israel, Tel Aviv is the country's second-most-populous city, after Jerusalem; if not, Tel Aviv is the most populous city, ahead of West Jerusalem.

Gush Dan or Tel Aviv metropolitan area is a conurbation in Israel, located along the country's Mediterranean coastline. There is no single formal definition of Gush Dan, though the term is in frequent use by both governmental bodies and the general public. It ranges from combining Tel Aviv with cities that form an urban continuum with it, to the entire areas from both the Tel Aviv District and the Central District, or sometimes the whole Metropolitan Area of Tel Aviv, which includes a small part of the Southern District as well. Gush Dan is the largest conurbation and metropolitan area in Israel, with the metropolitan area having an estimated population of 4,156,900 residents, 89% of whom are Israeli Jews.