Nitrica (Hungarian: Rákosvölgyudvarnok) is a village and municipality in Prievidza District in the Trenčín Region of western Slovakia.

It is known from the oral narratives of older people that the inhabitants here were engaged in agriculture, small-scale trade and selling fruit, and in the earliest times also selling clay vessels that they made themselves.

The main source of livelihood for the local population was fruit growing associated with trade.

A new church dedicated to St. Michael was built in the village in 2013,[1] and there is a chapel dedicated to the Divine Heart of Jesus,[2] which was built in 1919 by Michal Šramka and his wife Karolína in memory of their two sons who died in the World War on the Russian battlefield.

The municipality lies at an altitude of 246 metres and covers an area of 24.034 km².