Residents accounted for 73.5% of total arrivals at accommodation establishments in April, while foreigners made up for the reminder 26.5%.
The vast majority of foreign visitors (93.3%) came from Europe, the data showed.
In January through May, tourist arrivals and overnight accommodations rose by 12.9% and 8.5% on the year respectively.
Romanian tourist departures abroad inched down 1.4% on the year in the first five months.