Yes, you do. Census helps the government/private companies know the number and the types of people in your town/state/country. When you prinformation, you get better service.If you're worried about your personal information getting leaked, don't be. A census usually only requires your name and the no. of people in your house (depends on the scale of the census)You got to nothing to lose anyway. Just give the information. It'll take less than 5 minutes.