|Administrative region||Central Macedonia|
|• Municipality||334.3 km2 (129.1 sq mi)|
|• Municipal unit||206.1 km2 (79.6 sq mi)|
|• Municipality density||58/km2 (150/sq mi)|
|• Municipal unit||10,760|
|• Municipal unit density||52/km2 (140/sq mi)|
|Time zone||UTC+2 (EET)|
|• Summer (DST)||UTC+3 (EEST)|
The municipality Kassandra was formed at the 2011 local government reform by the merger of the following 2 former municipalities, that became municipal units (communities in brackets):
- Kassandra (Afytos, Fourka, Kalandra, Kallithea, Kassandreia, Kassandrino, Kryopigi, Nea Fokaia)
- Pallini (Agia Paraskevi, Chaniotis, Nea Skioni, Paliouri, Pefkochori, Polychrono)
The municipality has an area of 334.280 km2, the municipal unit 206.097 km2.
Pallene (Greek: Παλλήνη) is the ancient name of the westernmost of the three headlands of Chalcidice, which run out into the Aegean Sea. It is said to have anciently borne the name of Phlegra (Φλέγρα) and to have witnessed the conflict between the gods and the earthborn Gigantes. The modern name of the peninsula is Kassandra, which, besides affording excellent winter pasture for cattle and sheep, also produces an abundance of grain of superior quality, as well as wool, honey, and wax, besides raising silkworms. In antiquity, Pallene was the site of numerous towns: Sane, Mende, Scione, Therambos, Aege, Neapolis, Aphytis, which were either wholly or partly colonies from Eretria.
After the founding of the Roman colony of Cassandreia (43 BC), the entire peninsula of Pallene was included in the colony territory. 
In Late Antiquity, the center of the peninsula was the city of Cassandreia, located at the site of ancient Potidaia. A polis and a bishopric, Cassandreia was destroyed by the Huns in 539 or 540 AD. After this, Emperor Justinian I built a wall at the entrance of the peninsula, but it is not until the 10th century that a sizeable settlement—described as a township (polichnion) and later as a fortress (kastron)—re-appears in the peninsula and that the bishopric is mentioned again, as a suffragan of Thessalonica. The area prospered due to its fertility, and both Thessalonians as well as the monks of the growing monastic community at nearby Mount Athos had estates there.
In the winter of 1307/08, the peninsula and the city were seized and held by the Catalan Company during their move from Thrace to southern Greece. The 14th-century historian Nikephoros Gregoras describes Kassandreia as "abandoned" during his time, and sometime before 1407, Emperor John VII Palaiologos rebuilt the old fortifications of Justinian. As a de facto annex of Thessalonica, the peninsula shared the city's fate and came under a brief Venetian control in 1423, before being captured by the Ottoman Empire in ca. 1430.
Kassandra (Turkish: Kesendire) was one of the places that rebelled against the Ottomans in 1821. Because it managed to stop the Turkish army from fighting the south Greece rebels it was burnt from edge to edge. The refugees moved with fishing boats to the islands of Skiathos, Skopelos, Alonissos and Evoia. Nobody lived in the peninsula for more than 30 years. Then the population started to gather again. In 1912 it became a part of Greece.
The peninsula was lined with paved road in the mid-20th century. Tourism also arrived beginning after the war period of World War II and the Greek Civil War. More paved roads were added in the 1970s and the 1980s and tourism developed rapidly. Agriculture shifted to tourism and other businesses as the primary industry of the peninsula in the 1980s.
On August 22, 2006, the peninsula was struck by a major forest fire that affected the central and the southern parts of the peninsula, on the day of the heatwave when temperatures soared to nearly 40 °C. Several houses were destroyed including villas and hotels, and one campground disappeared, while the natural beauty was erased. It burnt about 1,000 to 20 square kilometres of forests including some farmlands. Aerial pictures taken near Sani Beach inland at a point where pastures and mountain roads are located showed smoke throughout the peninsula. It can be seen across the gulf. The cause of this tremendous fire was dry lightning which occurred throughout the evening. Power was cut to all affected villages. The forest fire lasted nearly five days and devastated the economy and the peninsula. All roads in the southern part were closed. Villages that were affected were Chanioti, Nea Skioni, Polychrono, Pefkochori, Kriopigi, Kassandrino and near the coastline.
Cassandreia is twinned with the following cities:
Media related to Kassandra at Wikimedia Commons
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- Kallikratis law Greece Ministry of Interior (in Greek)
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- This article incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Pallene". Dictionary of Greek and Roman Geography. London: John Murray.
- Herodotus. Histories, vii. 123.
- Pind. Nem. i. 100, Isthm. vi. 48; Apollod. i. 6. § 1; Lycophron 1408; Strabo vii. p. 330; Steph. B. s. v.
- William Martin Leake, Northern Greece, vol. iii. p. 163.
- ( VII.27 Fragments )
-  D. C. Samsaris, The Roman Colony of Cassandreia in Macedonia (Colonia Iulia Augusta Cassandrensis) (in Greek), Dodona 16(1), 1987, p. 353-362
- Gregory, Timothy E.; Kazhdan, Alexander (1991). "Kassandreia". In Kazhdan, Alexander. The Oxford Dictionary of Byzantium. Oxford and New York: Oxford University Press. p. 1109. ISBN 0-19-504652-8.