Staatsarchiv des Kantons Zürich, State archive in Zürich, Switzerland.

The Staatsarchiv des Kantons Zürich occupies Bau 1 on the Irchel campus of the University of Zurich in the Oberstrass quarter, a building opened in 1982 with extensions added in 2007 and 2019. Its six floors, four of them underground, hold over 30 kilometres of paper files plus electronic records, with five reading rooms offering 80 workstations.

The archive's holdings reach back to the 8th century, including a document from 853 when Zürich was the imperial Pfalz Turicum. It preserves records of the old city-state until 1798 and of the canton founded in 1803. In 1837 Gerold Meyer von Knonau became the first Staatsarchivar, merging special archives into a central archive; it moved to the Irchel site in 1982.

The collection Patentschriften gathers over 50,000 patent applications filed by Zurich residents at the Swiss Federal Patent Office between 1888 and 1978, among them Hermann Brupbacher's 1894 bathing suit with sewn-in rubber tubes filled with crushed cork. The Objekte collection begins with the 1347 city seal stamp showing saints Felix, Regula and Exuperantius, and also holds a 1909 dog measuring device and the 1831 cantonal council ballot box used for pardon petitions.

The archive sits on the Irchel campus of the University of Zurich in the Oberstrass quarter. Documents are consulted in five reading rooms with 80 workstations; nothing is lent out, and holdings past their protection period are ordered and viewed free of charge on site.

Among the holdings is a collection of more than 50,000 patent specifications filed in Zurich between 1888 and 1978, including Hermann Brupbacher's 1894 bathing suit with sewn-in rubber tubes filled with crushed cork for non-swimmers. The oldest object is the city seal stamp of 1347 showing Saints Felix, Regula and Exuperantius.