Koznitsa (peak) - a mountain peak in the western part of Stara planina.

Koznitsa (Bulgarian Cyrillic: Козница) may refer to any of the following locations in Bulgaria:

Koznitsa (village) - a village in Bulgaria, Burgas Province;

Koznitsa (ridge) - a ridge connecting Stara planina and Sredna gora mountains;

Koznitsa (tunnel) - a railway tunnel under the Koznitsa ridge, the longest tunnel in Bulgaria;