Deventer (Dutch: [ˈdeːvəntər] (listen); Sallands: Daeventer) is a city and municipality in the Salland historical region of the province of Overijssel, Netherlands. In 2020, Deventer had a population of 100,913. The city is largely situated on the east bank of the river IJssel, but it also has a small part of its territory on the west bank. It is situated about 14 km north east of Apeldoorn, 50 km west of Enschede and 28 km south of Zwolle. In 2005 the municipality of Bathmen (with a population of about 5,000 people) was merged with Deventer as part of a national effort to reduce bureaucracy in the country.
Deventer is one of the oldest cities in the Netherlands. The place is already mentioned in 9th-century sources of the Diocese of Utrecht. In a charter from 877 AD mentions seven hooves in Daventre portu (the Deventer harbor). In 952 AD, Deventer is mentioned as a city in a gift certificate from King Otto I.