Tell es-Safi (Arabic: تل الصافي, romanized: Tall aṣ-Ṣāfī, "White hill"; Hebrew: תל צפית, Tel Tzafit) was an Arab Palestinian village, located in the Shephelah region on the southern banks of Wadi 'Ajjur, 35 kilometers (22 mi) northwest of Hebron, which had its Arab population expelled during the 1948 Arab–Israeli war. Archaeological excavations show that the site (a tell or archaeological mound) was continuously inhabited since the 5th millennium BCE, and it is widely identified with the Philistine city of Gath.

The site appears on the 6th-century Madaba Map as Saphitha, while the Crusaders called it Blanche Garde. It is mentioned by Arab geographers in the 13th and 16th centuries. Under the Ottoman Empire, it was part of the district of Gaza. In modern times, the houses were built of sun-dried brick. The villagers were Muslim and cultivated cereals and orchards.

Today the site, known as Tel Tzafit, is an Israeli national park incorporating archaeological remains which are generally, if not by all, identified as the Philistine city of Gath, mentioned in the Hebrew Bible. The remains of the Crusader fort and the Arab village can also be seen on the tell.

The 6th-century Madaba Map calls it Saphitha. In the 19th century the white chalk cliff at the site was seen as the cause for the Arabic name: Tell es-Safi means 'clear or bright mound'. The name used in the Crusader period was Blanche Garde, 'White Fortress' in French, and Alba Specula ('White Lookout/Watch-tower') or Alba Custodia ('White Guard') in Latin.

Tell es-Safi sits on a site 300 feet (91 m) above the plain of Philistia and 700 feet (210 m) above sea level, and its white-faced precipices can be seen from the north and west from several hours distant. Tell es-Safi is situated between the Israeli cities of Ashkelon and Beit Shemesh and is one of the country's largest Bronze and Iron Age sites.

Victor Guérin thought that Tell es-Safi was the "watch-tower" mentioned in Joshua 15:38, based on its etymological meaning, but the site is now believed to be the site of the Philistine city of Gath. The identification was opposed by Albright, who noted its proximity to another leading city from the Philistine league, Ekron (Tel Miqne), but later excavations turned up more supportive evidence for Tell es-Safi.

Schniedewind writes that Gath was important for the Philistines in the eighth century BCE because of its easily defended geographical position. Albright argued that Tell es-Safi was too close to Tel Miqne/Ekron to be Gath. The sites are only 8 km apart. However, both Tell es-Safi and Tel Miqne were major sites in the Middle Bronze through the Iron Age. The agricultural features of this region of the southern coastal plain may be part of the explanation. Additionally, there is no certainty that the two sites flourished simultaneously. Literary sources suggest that Gath flourished in the Late Bronze and Early Iron Ages until its destruction by the Assyrians in the late eighth century BCE. The heyday of Ekron was the seventh century BCE, after the site was taken over by the Assyrians as an agricultural administrative center (Dothan and Gitin 1993).

Excavations at Tell es-Safi since 1996 indicate that the site was settled "virtually continuously from the Chalcolithic until the modern periods."