Čajkov is a municipality in Levice District, in the Nitra Region, Slovakia. Čajkov lies at 190 m above sea level, at the foot of the Štiavnica mountains. It has 928 inhabitants (2025). The nearest city is Levice, 8.0 km to the south. Among the landmarks around are Hronský Beňadik monastery (6.8 km), Nitra Castle (38 km) and Sitno (25 km). Among the natural features are Veľký Inovec (13.9 km) and Starohutiansky waterfall (15.3 km).