The old railway station.
|Population statistics (as of 2011)|
|- Area:||565.6 km2 (218 sq mi)|
|- Density:||42 /km2 (108 /sq mi)|
|- Area:||84.6 km2 (33 sq mi)|
|- Density:||117 /km2 (303 /sq mi)|
|Time zone:||EET/EEST (UTC+2/3)|
|Elevation (center):||5 m (16 ft)|
|Postal code:||242 00|
Messini (Greek: Μεσσήνη) is a municipal unit (dimotiki enotita) and seat (edra) of the municipality (dimos) of Messini within the regional unit (perifereiaki enotita) of Messenia in the region (perifereia) of Peloponnese, one of 13 regions into which Greece has been divided. Before 2011 the same hierarchy prevailed, according to Law 2539 of 1997, the Kapodistrias Plan, except that Messenia was a nomos and the Municipal unit was a locality (topiko diamerisma). The dimos existed under both laws, but not with the same constituents.
Messini (modern pronunciation) is not to be confused with its ancient namesake, Messene, located 15 kilometres (9.3 miles) to the north in the shadow of Mount Ithome. The two are unrelated. Messini is an urban center on the right bank of the Pamisos River, now a straightened and controlled irrigational stream, across the river from the airport and close to the major city of Messenia, Kalamata. Ancient Messene is an equally large but abandoned site of ruins partially occupied by the small village of Mavrommati (not to be confused with Mavrommati Pamisou, or just Pamisou, on the north of the modern city). Messini did not gradually become nor was it created by population transfer from Ancient Messene. Formerly Nisi, it underwent a name change to Messini in the late 19th century.
Modern town 
The modern town has some 10,000 inhabitants. It is the second largest municipality of Messinia. Messini has schools, lyceums, gymnasia, banks, a post office, and squares (plateia) named Kentriki Plateia or Central Square. The square is surrounded with a few pine trees with a building to the southwest, grass with two walkways to the north along with a few palm trees; a famous white clock tower without windows is in the middle of the square. The town is accessed by Greek National Road 82 (Pylos - Kalamata - Sparta) which has been bypassed to the south and a road to Efa (Eua) to the north. The nearest beach is in the southwest. The farmlands which used to resemble a wetland are to the southeast. Messini had a railway station from the 1900s with a connection of the SPAP line from Kalamata (Asprochoma) about 5 km (3.11 mi) east. It was the westernmost terminus of this line until its abandonment in the late 20th century. This line was reopened in 2007 and subsequently operated with additional halts at the military and civilian airports. However, along with the rest of the railways in the Peloponnese, operations were suspended in 2010 due to Greece's financial problems.
Landmarks near Messini include Kalamata airport to the east, and the beaches south of the town.
Before the reorganization, the municipality of Messini contained 14 local divisions (topika diamerismata) for a total population of 11041. Since 2010 Messini has still been a municipality, one of the six of Messenia. However, it has absorbed seven other former municipalities. These, and the former municipality of Messini, have become municipal units (dimotikes enotites) of the municipality Messini, with a total population of 23,482 (2011 census). These are as follows:
The municipal unit of Messini contains the same subdivisions and populations as did the previous municipality of Messini but the subdivisions are now local communities. These are as follows:
In summary, Messini is a town, a municipal unit and a municipality.
The province of Messini (Greek: Επαρχία Μεσσήνης) was one of the provinces of the Messenia Prefecture. Its territory corresponded with that of the current municipality Messini (except the municipal units Aipeia, Petalidi and Voufrades) and the municipal units Andania, Meligalas and Oichalia. It was abolished in 2006.
Messini began its communal existence as Nisi, a settlement placed on an island (nēsos, from which Nisi) in the extensive marshland at the mouth of the Pamisos River. It was placed in Frankish territory, the Principality of Achaia, dated 1205-1432, consisting of 40 villages in Messenia and Elis. The ethnic content of the population in the vicinity at that time was Greeks and Christianized, Hellenized Slavs, which is reflected in the names of the villages around Messini. After 1432, when the Byzantine Empire fell and was commandeered by the Ottoman Empire, some Turks entered the region. Except for the names, these distinctions have more or less disappeared in modern Greece.
Baedeker's for the later 19th century and early 20th centuries referred to Nisi as "now officially Messini," a phrase that was widely used in travelogues of the period. The earliest Baedeker's to do so is the German edition of 1888. Prior to 1887 Nisi is not treated as Messini. These facts suggest the government of Greece changed the official name to Messini in 1887, a time of political change. Subsequent references to the place often refer to Nisi as "the popular name."
Recent population growth 
The populations of the town for the last few census' are given below.
|Census Year||Town population|
Notable people 
- Detailed census results 2011 (Greek)
- η Βουλή 2010, p. 17435
- Hellenic Interior Ministry 2001, Lines 6916-6931.
- η Βουλή 2010, p. 17436
- PDF (39 MB) (Greek) (French)
- Topping, Peter (1972), "The Post-classical Documents", in McDonald, William A; Rapp, George Robert, The Minnesota Messenia expedition: reconstructing a bronze age regional environment, Minneapolis: University of Minnesota Press, p. 66
- Hellenic Interior Ministry (18 March 2001). "Δείτε τη Διοικητική Διαίρεση" (in Greek). Hellenic Interior Ministry.. The previous Kapodistrias organization of all the communities in Greece. The populations are from the Census of 2001.
- η Βουλή (11 August 2010), "ΤΕΥΧΟΣ ΔΕΥΤΕΡΟ", NOMOΣ ΥΠ’ΑΡΙΘ. 3852: Νέα Αρχιτεκτονική της Αυτοδιοίκησης και της Αποκεντρωμένης Διοίκησης − Πρόγραμμα Καλλικράτης (in Greek), ΕΦΗΜΕΡΙΣ ΤΗΣ ΚΥΒΕΡΝΗΣΕΩΣ ΤΗΣ ΕΛΛΗΝΙΚΗΣ ΔΗΜΟΚΡΑΤΙΑΣ. Part 2 of the Kallicratis Plan law, No. 3852, by the Hellenic Parliament (Βουλή), publishing a table of all the official communities of Greece arranged in hierarchical order. The lowest-level populations are from the Census of 2001. All higher-level populations are the sums of the appropriate lower-level populations.
- "Hellenic Interior Ministry" (in Greek).
- "Municipality of Messini" (in Greek, English). Retrieved 9 October 2011.
- "Messini". World Places. 2008-2009.