2010 United States Census: Population Trends and Reapportionment
The 2010 United States Census, conducted on April 1, 2010, served as the twenty-third official headcount of the U.S. population. This massive undertaking by the U.S. Census Bureau provides the foundational data used to determine political representation and allocate federal resources across the nation.
The results revealed a total U.S. population of 308,745,538, representing a 9.7% increase from the 2000 census. This growth was unevenly distributed, with some states experiencing rapid expansion while others saw slight declines.
Key Facts
- Total Population: 308,745,538 (9.7% growth since 2000).
- Most Populous State: California (37,253,956).
- Least Populous State: Wyoming (563,826).
- Highest Growth State: Nevada (35.1% increase).
- Budget Efficiency: $150 million was saved due to lower-than-planned costs in tribal lands and Alaska.
Demographic Data Collection
The 2010 census utilized a standardized questionnaire to gather essential data on every resident. The primary focus was on identifying the number of people living at each address and their basic characteristics.
Key questions included the resident's name, sex, and race. The race section provided 14 checkboxes, including options such as "Black, African Am., or Negro" and "Other." Additionally, the census sought to identify residents who might occasionally live or stay in alternative locations to ensure an accurate count of the population.
Congressional Reapportionment
One of the most critical outcomes of the census is reapportionment, the process of redistributing the 435 seats in the U.S. House of Representatives based on population changes.
The 2010 data led to significant shifts in political power. Texas saw the largest gain, adding four seats to its delegation. Other states that gained representation included Florida (two seats), as well as Arizona, Georgia, Nevada, South Carolina, Utah, and Washington (one seat each).
Conversely, several states lost representation. New York and Ohio each lost two seats, while Illinois, Iowa, Louisiana, Massachusetts, Michigan, Missouri, New Jersey, and Pennsylvania each lost one seat.
State and Metropolitan Population Analysis
The census highlighted a continuing trend of population growth in the Sun Belt and a slowing of growth in the Northeast and Midwest. Nevada led the nation in percentage growth at 35.1%, followed closely by Arizona at 24.6%.
Top 10 Most Populous States
California remained the most populous state, though Texas showed the most significant numerical growth, adding over 4.2 million residents between 2000 and 2010.
| Rank | State | 2000 Population | 2010 Population | Percent Change |
|---|---|---|---|---|
| 1 | California | 33,871,648 | 37,253,956 | 10.0% |
| 2 | Texas | 20,851,820 | 25,145,561 | 20.6% |
| 3 | New York | 18,976,457 | 19,378,102 | 2.1% |
| 4 | Florida | 15,982,378 | 18,801,310 | 17.6% |
| 5 | Illinois | 12,419,293 | 12,830,632 | 3.3% |
| 6 | Pennsylvania | 12,281,054 | 12,702,379 | 3.4% |
| 7 | Ohio | 11,353,140 | 11,536,504 | 1.6% |
| 8 | Michigan | 9,938,444 | 9,883,640 | -0.6% |
| 9 | Georgia | 8,186,453 | 9,687,653 | 18.3% |
| 10 | North Carolina | 8,049,313 | 9,535,483 | 18.5% |
Urban Centers and Density
At the city level, New York remained the largest city by a wide margin, with a population of 8,175,133 and the highest population density among the top cities at 27,016.3 people per square mile. Los Angeles followed as the second largest city with 3,792,621 residents.
In terms of Metropolitan Statistical Areas (MSAs)—regions consisting of a high-density urban core and its surrounding communities—the New York-Newark-Jersey City area was the largest, totaling 19,567,410 people.
Frequently Asked Questions
What was the total population of the U.S. in 2010?
The total population was 308,745,538, which was a 9.7% increase from the 2000 census.
Which state gained the most congressional seats?
Texas gained the most representation, adding four seats to the House of Representatives.
Which state had the highest percentage of population growth?
Nevada experienced the highest growth rate, with a population increase of 35.1%.
What was the most populous city in the 2010 census?
New York City was the most populous, with 8,175,133 residents.
How much money was saved during the 2010 census operations?
Approximately $150 million was saved due to lower-than-expected costs in areas such as tribal lands and Alaska.