Kreis Adelnau (Polish: Powiat [[Odolanów|odolanowski]]) was a county in the southern administrative district of Posen, in the Prussian province of Posen.
Kreis Adelnau was part of the military command (German: Bezirkskommando) in Posen at Ostrowo.
The main court (German: Landgericht) was in Ostrowo, with lower courts (German: Amtsgericht) in Aldenau and Ostrowo.
In 1905, these civil registry offices (German: Standesamt) served the following towns in Kreis Adelnau:
In 1905, these police districts (German: Polizeidistrikt) served towns in Kreis Adelnau:
In 1905, these Catholic parish churches served towns in Kreis Adelnau:
In 1905, Protestant parish churches served towns in Kreis Adelnau: