Olt County is a county (județ) of Romania on the border with Bulgaria, in the historical regions of Oltenia and Muntenia (the regions are separated by the Olt river). The capital city is Slatina.
On 24 August 2017, the Olt County Council decided to hold a local referendum on 15 October 2017 on the proposal to change the county name to "Olt-Romanați". The local referendum was eventually held on 7 October 2018, at the same time with the constitutional referendum regarding the change of the definition of the family as provided by Article 48 of the Romanian Constitution in order to outlaw same-sex marriage. The local referendum failed, as the turnout was 27.19%, below the required threshold of 30%, therefore the Olt County retains its current name.
In 2011, it had a population of 415,530 and the population density was 75.57/km².
* Romanians - 98.06%
* Romani - 1.86%, and other.
The county is a mainly rural one, with over 60% of the population living in villages.