Research of vascular flora of the anthropogenic water surfaces of the Ludbreg area (gravel pit in Hrastovljan and „Otok mladosti“ in Ludbreg) was carried out during the vegetation season 2016. So far there are no recorded floristic data for these two areas. On the studied area of approximately 3 km², a total of 248 taxa of vascular plants have been recorded and classified into 80 families. Around the gravel pit in Hrastovljan, with a surface of approximately 2 km², 171 taxa of vascular plants has been recorded and classified into 64 families and around „Otok mladosti“ in Ludbreg, with a surface of approximately 1 km², 164 taxa of vascular plants have been recorded and classified into 61 families. The most abundant families are Poaceae (9.27 %), Fabaceae (6.85 %), Asteraceae (6.45 %) and Rosaceae (6.05 %). The life forms spectrum indicates dominance of hemicryptophytes (42.34 %) and the prevailing floral element is Euroasian (56.45 %), which classifies the studied area as Euro-Siberian-North American region. Two strictly protected taxa are recorded, and eight of recorded floral taxa are classified in five categories of threatened species according to the IUCN. Alien flora is represented by 54 taxa (21.77%), 20 of which (8.06%) belong to invasive species. A comparative analysis of two studied areas shows the similarities and differences between them.