|• Mayor||Franz Stefan Karlinger (SPÖ)|
|• Total||33.27 km2 (12.85 sq mi)|
|Elevation||281 m (922 ft)|
|Population (14 June 2016)|
|• Density||350/km2 (910/sq mi)|
|Time zone||CET (UTC+1)|
|• Summer (DST)||CEST (UTC+2)|
Enns was one of the first places in Austria to receive town privileges. The town charter dates to 22 April 1212, the document is displayed at the local museum. The date is also depicted on the Town Tower, the landmark of Enns.
The municipality can be subdivided into the districts of Einsiedl, Enghagen, Enghagen am Tabor, Enns, Ental, Erlengraben, Hiesendorf, Kottingrat, Kristein, Kronau, Lorch, Moos, Rabenberg and Volkersdorf.
The first settlements in the area of the mouth of the Enns river to the Danube date back to 4,000 years ago. Celts settled the land around 400 BC. Their kingdom of Noricum was incorporated into the Roman Empire in AD 15 and was designated as a Roman province under the reign of Emperor Claudius in AD 45.
In the second and third century, the Roman camp of Lauriacum, in which up to 6,000 soldiers were stationed, was located on the site of modern Enns. The adjacent settlement (today: Lorch) received the privileges of a municipium in 212 from Emperor Caracalla. At that time about 30,000 people lived here. During the Diocletian Persecution of Christians, a commander of the Roman army, Saint Florian, died as a martyr at Lauriacum on 4 May 304, when he was drowned in the Enns river. Only nine years later, the Emperor Constantine I proclaimed religious tolerance with the Edict of Milan. About 370, an Early Christian basilica was built on the remains of a Jupiter temple and Lauriacum was the see of a bishop until 488. The present Basilica of St. Lawrence at Lorch was built in 1344 on the foundations of the old church 
About 900, the Enisiburg castle, later Ennsegg Palace, was built on the Georgenberg hill to serve as a protective fortress against Magyar invasions. The surrounding settlement prospered from the 12th century onwards, when Ottokar II, Margrave of Styria established a market here. In 1186 the Georgenberg Pact was signed, an inheritance contract between Ottokar IV, Duke of Styria, who lacked a male heir, and the Babenberg duke of Austria, Leopold V. Following the death of Ottokar IV in 1192, his Duchy of Styria — then significantly bigger than the contemporary state, reaching from present day Slovenia to Upper Austria — fell to the House of Babenberg. Thus, Enns became Austrian.
As Leopold VI, Duke of Austria, endowed Enns with town privileges in 1212, it is now considered Austria's oldest town (apart from the Roman municipal status). The landmark of Enns, the belfry (Town Tower) on the Main Square, was erected between 1564 and 1568 as a bell tower, watch and clock tower during the reign of emperor Maximilian II.
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The municipal council consists of 37 members. Since the 2003 elections, party representation on the council has been as follows:
- 21 Social Democratic Party of Austria
- 12 Austrian People's Party
- 3 Austrian Green Party
- 1 Freedom Party of Austria
The current mayor is Franz Stefan Karlinger, a Social Democrat.
In 1991, Enns had 10,192 inhabitants according to the census. The number grew to 10,639 in the census of 2001.
- Statistik Austria - Bevölkerung zu Jahresbeginn 2002-2016 nach Gemeinden, Erstellt am 14.06.2016 (Last accessed 13.12.2016) for Enns.
- Severin: Zwischen Römerzeit und Völkerwanderung; Katalog Ausstellung des Landes Oberösterreich 24 April bis 26 Oktober 1982 im Stadtmuseum Enns. Linz 1982
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