Kreis Meseritz (Polish: Powiat międzyrzecki) was a county in the southern administrative district of Posen, in the Prussian province of Posen. It presently lies in the eastern part of Polish region of Lubuskie Voivodeship.
The Kreis came into existence on January 1, 1818 as a result of the Congress of Vienna. It consisted mostly of the rural territories around the town of Meseritz. It became part of the North German Confederation in 1867 and of the Reich when it was founded in 1871. After World War I, the administration had to be reorganised because the Posen district was split, The eastern art of the county was handed over to Poland in 1920, according to the Versailles treaty. In 1922, the remaining county joined the newly-founded district Grenzmark Posen-Westpreussen and the Regierungsbezirk Schneidemühl. When the district was dissolved in 1938, it became part of the Province of Brandenburg. In 1945, the Kreis Meseritz was occupied by the Red Army and integrated into Poland.
In 1905, these civil registry offices (German: Standesamt) served the following towns in Kreis Meseritz: