 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.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 Roma.The number of Roma people is usually underestimated in official statistics and may represent 5–11% of Romania's population.