Raseiniai County (Russian: Россиенский уезд, Lithuanian: Raseinių apskritis) was one of the counties of the Russian Empire with its seat in Raseiniai from 1793 until 1915 when it became a part of Lithuania District in Oberost.
Established 1795 under the rule of Vilna Governorate. 1842 transferred to Kovno Governorate.
At the time of the Russian Empire Census of 1897, Rossiyensky Uyezd had a population of 235,362. Of these, 76.2% spoke Lithuanian, 11.2% Yiddish, 5.5% Polish, 4.4% German, 2.0% Russian, 0.3% Ukrainian, 0.1% Belarusian and 0.1% Latvian as their native language.[1]