采西斯县 （Cēsu rajons）是拉脱维亚北部的一个县。面积3,062平方公里。人口57,228人。县治采西斯。下分2市1镇21村。

Cēsis District (Latvian:Cēsu rajons) was an administrative division of Latvia, located in the Vidzeme region, in the country's north-east. It bordered the former districts of Valmiera and Valka to the north, Limbaži and Riga to the west, Gulbene to the east, Ogre and Madona to the south. It was organized into two cities, a municipality and twenty one parishes, each with a local government authority. The center of the district was the city of Cēsis.