Ključ Brdovečki is a naselje (settlement) in the municipality of Brdovec, Zagreb County, Croatia.

According to the 2001 census, it has 663 inhabitants[3] living in an area of 3.20 square kilometers (1.24 sq mi).

[4] The village became the site of a mass grave from May 23–25, 1945 when Axis soldiers were massacred there by the Yugoslav Partisans.

[5] The Wehrmacht had dug anti-tank trenches in the village, which were used to bury the dead.

[6] It is estimated that there are 4000 bodies in the graves, with many of them being members of the 392nd (Croatian) Infantry Division (Wehrmacht).