Delaware is located in the northeastern portion of the Delmarva Peninsula and is the second smallest state in area (after Rhode Island). Estimates in 2007 rank the population of Delaware as 45th in the nation, but 6th in population density, with more than 60% of the population in New Castle County.Delaware is divided into three counties. From north to south, these three counties are New Castle, Kent, and Sussex. While the southern two counties have historically been predominantly agricultural, New Castle County has been more industrialized.
Since almost all of Delaware is a part of the Atlantic Coastal Plain, the effects of the ocean moderate its climate. The state is in a transitional zone between a humid subtropical climate and a continental climate. Despite its small size (roughly 100 miles (160 km) from its northernmost to southernmost points), there is significant variation in mean temperature and amount of snowfall between Sussex County and New Castle County. The southern portion of the state has a somewhat milder climate and a longer growing season than the northern portion of the state. Delaware's all time record high of 110 °F degrees was recorded at Millsboro on July 21, 1930; the all time record low of −17 degrees was also recorded at Millsboro on January 17, 1893.
According to the 2010 U.S. Census, Delaware had a population of 897,934. In terms of race and ethnicity, the state was 68.9% White (65.3% Non-Hispanic White Alone), 21.4% Black or African American, 0.5% American Indian and Alaska Native, 3.2% Asian, 0.0% Native Hawaiian and Other Pacific Islander, 3.4% from Some Other Race, and 2.7% from Two or More Races. Hispanics and Latinos of any race made up 8.2% of the population. Delaware is the sixth most densely populated state, with a population density of 442.6 people per square mile, 356.4 per square mile more than the national average, and ranking 45th in population.