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Kreis Obornik () was a district in Regierungsbezirk Posen in the Prussian province of Posen until 1919. Its territory presently lies in the north-western part of Polish region of Greater Poland Voivodeship.
Demographics
{| class="wikitable"
|+Population of Kreis Obornik
!
! colspan="2" |1831
! colspan="2" |1861
|-
|Germans
|14,849
|41.9%
|22,351
|47.7%
|-
|Poles
|20,598
|58.1%
|24,490
|52.3%
|-
|Total
| colspan="2" |35,447
| colspan="2" |46,841
|}
Civil registry offices
In 1905, these civil registry offices () served the following town in Kreis Obornik:
- Obornik