Planning & Development


The table below reflects population data for Seminole County from the 2010 Census. Seminole County achieved a 77% Participation Rate, exceeding the 74% rate for the Nation and for Florida. 
Jurisdiction 2010 2000 Population Change Percent Change
United States 308,745,538 281,421,906 27,323,632 9.7
Florida 18,801,310 15,982,378 2,818,932 17.6
Seminole County* 422,718 365,196 57,522 15.8
City of Altamonte Springs 41,496 41,200 296 0.7
City of Casselberry 26,241 22,629 3,612 15.9
City of Lake Mary 13,822 11,458 2,364 20.6
City of Longwood 13,657 13,745 -88 -0.6
City of Oviedo 33,342 26,316 7,026 26.7
City of Sanford 53,570 38,291 15,279 39.9
City of Winter Springs 33,282 31,666 1,616 5.1

*Includes city populations. Cities-215,410 (50.9%); unicorporated Seminole County-207,308 (49.0%). Source: U.S. Census Bureau

Data Sets Avaliable at American FactFinder
Beginning in March 2011, the U.S. Census began releasing local-level population, housing, economic, and geographic data from the 2010 Census. These data are available in thousands of tables on the American FactFinder website. This website also provides access to the American Community Survey (ACS) and the Economic Census. The ACS collects information annually, on topics such as age, race, income, commute time to work, home value, veteran status, and other important data. The Economic Census provides a detailed portrait of the Nation's economy once every five years, from the national to the local level. For more information, visit the American FactFinder site at 

What is the Census?

The U.S. Constitution requires a census of the population to occur every 10 years. Population numbers from the 2010 Census will determine allocation of billions of dollars in federal funds for such activities and programs as neighborhood improvements, public health, education, and transportation important to the quality of life of residents of Seminole County. Census data will also determine representation in the U.S. House of Representatives and for redistricting state and local legislative districts.
Is the Census Confidential?
Information on the confidentiality and privacy of the information you provide on the Census. 

Want More Information?

For more information on the Census, view the Official U.S. Census Website. This site provides additional frequently asked questions as well as interactive videos about the Census.

Every 14 seconds, the U.S. Census Bureau’s population clock ticks upward. Visit the U.S. and World Population Clock for the most recent population estimates.

For more information on business and development in Seminole County, view the Seminole County Economic Development Website