Knieja
Knieja may refer to the following places:
- Knieja, Tuchola County in Kuyavian-Pomeranian Voivodeship (north-central Poland)
 - Knieja, Żnin County in Kuyavian-Pomeranian Voivodeship (north-central Poland)
 - Knieja, Silesian Voivodeship (south Poland)
 - Knieja, Opole Voivodeship (south-west Poland)
 - Knieja, Człuchów County in Pomeranian Voivodeship (north Poland)
 - Knieja, Kościerzyna County in Pomeranian Voivodeship (north Poland)
 - Knieja, West Pomeranian Voivodeship (north-west Poland)