The Rabrovska reka () is a river in northwestern Bulgaria, a left tributary of the Topolovets, itself a right tributary of the Danube. Its length is 26 km.
The river takes its source under the name Boynishka reka at an altitude of 328 m some 1.2 km northwest of the village of Golemanovo in the northwesternmost part of the Balkan Mountains. It flows in the western Danubian Plain in direction northeast. In its last 3 km it runs eastwards before flowing into the Topolovets at an altitude of 87 m about 3.3 km downstream from the village of Dolni Boshnyak.
Its drainage basin covers a territory of 137 km<sup>2</sup>, or 24% of the Topolovets's total.
The Rabrovska reka flows entirely in Vidin Province. From its mouth upstream runs a 12 km stretch of the third class III-121 road InovoâÂÂBoynitsaâÂÂKula. Its waters are utilized for irrigation via the Golemanovo Reservoir. Some 3 km downstream from the river's source is located the Albotin Monastery, a medieval Bulgarian cave sanctuary with fresco fragments dating from the 14th century during the Second Bulgarian Empire.