Residents accounted for 75.8% of total arrivals at accommodation establishments in April, while foreigners made up for the reminder 24.2%.
The vast majority of foreign visitors (85.2%) came from Europe, the data showed.
Foreign tourist arrivals to Romanian borders declined 7.6% on the year in April, while Romanian tourist departures aboard fell 8%, INS said.
In the first four months of 2013, tourist arrivals at Romanian accommodation establishments rose 6.9% compared with the year-earlier period, while overnight accommodations were up 2.7%.