Romani people constitute one of Romania's largest minorities. According to the 2011 census, they number 621,573 people or 3.08% of the total population, being the second-largest ethnic minority in Romania after Hungarians, with significant populations in Mureș (8.9%) and Călărași (7,47%) counties. There are different estimates about the size of the total population of people with Romani ancestry in Romania because a lot of people of Romani descent do not declare themselves Romani. The number of Romani people is usually underestimated in official statistics and may represent 5–11% of Romania's population.