Population Profiles for:

Greensboro: 223,891 (Greensboro Population Profile)

Guilford County: 421,048 (Guilford Population Profile)

North Carolina: 8,049,313 (North Carolina Population Profile)

 Websites

American Factfinder 2
Includes data from the 2010 Census and the 2000 Census.

American Factfinder
Includes data from the American Community Survey, the Economic Census, and the Population Estimates Program.  

Census 2000 QuickFacts 
A quick way to find basic data from Census 2000 for the United States, US states and counties. Also includes data from other sources.

2010 Census Address Search
This Census Bureau site lets you put in an address and get basic 2010 Census data for the Census block, Census tract, or larger Census geography in which the address is located.

2000 Census Data Radius Search
This site will take a particular point indicated by latitude and longitude values and combine 2000 Census data within a specified radius. The data is from Summary File 3 of the 2000 Census, which includes total population, age, race, gender, Hispanic origin, income, poverty, education and much more. Click on Usage Notes to find Web sites from which you can get latitude and longitude values. The site is maintained by the Missouri State Data Center. 

North Carolina State Data Center 2000 Census Data Website
This site features many tables of statewide and local data, as well as links to maps that can be viewed or printed. Also features profiles for the state, cities, counties, metropolitan statistical areas, Congressional districts, and Indian reservations. Profile subjects covered include total population, age, race, gender, household relationships, presence of children, educational attainment, school enrollment, language spoken at home, income, poverty status, occupation and more. 

Census 2000 Glossary
Definitions of many Census terms. 

CensusScope
An easy-to-use tool for examining trends in Census data from 1980 or 1990 through 2000. In some cases, the Census years used are earlier than 1980. The geographic areas covered are the United States, US states, metropolitan areas, and counties. Statistics are presented in a number of ways, including rankings tables, maps, and charts. This site is maintained by the Social Science Data Analysis Network at the University of Michigan.