E.g., 11/29/2023
E.g., 11/29/2023
Naturalization Trends in the United States

Naturalization Trends in the United States

Independence Day in the United States, which is on the fourth of July, is just around the corner, and with it comes the traditional holiday festivities, fireworks, and waving of American flags. This year, over half a million immigrants will join in the celebration as newly naturalized U.S. citizens. This spotlight examines foreign nationals age 18 and older who became U.S. citizens (i.e., naturalized) in 2010.

Unless otherwise noted, the data presented are from the Department of Homeland Security's Office of Immigration Statistics (OIS) Annual Flow Report on the number and characteristics of foreign nationals who naturalized in 2010, as well from tables available on the OIS website.

Note: all yearly data is for the government's fiscal year of October 1 through September 30 of the given year.

Click on the bullet points below for more information:


There were 16.8 million naturalized citizens in the United States in 2009.
Of the 38.5 million immigrants residing in the United States in 2009, 16.8 million (or 43.7 percent) were naturalized citizens, according to 2009 American Community Survey (ACS) estimates.

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In 2009, an estimated 7,870,000 lawful permanent residents were eligible for naturalization.
According to the latest available OIS estimates, there were 12.5 million lawful permanent residents (LPRs) who resided in the United States as of January 1, 2009. Of them, about 7.9 million were eligible to naturalize.

Of those eligible, 2.3 million (or 29.4 percent) lived in California, 920,000 (11.7 percent) lived in New York, 860,000 (11.0 percent) resided in Texas, and 680,000 (8.6 percent) were in Florida. (Source: USCIS, "Estimates of the Legal Permanent Resident Population in 2009." Available online.)

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Special Note

To be eligible for naturalization, an immigrant must be at least 18 years of age; have lawful permanent residence (a green card) for at least five continuous years (three continuous years if the individual is married to a U.S. citizen); have no criminal record; possess the ability to read, write, and speak simple words and phrases in English; and have knowledge and understanding of American history fundamentals and U.S. government principles.

During a designated time of war, foreign-born noncitizen military personnel are eligible for expedited citizenship.

In 2010, U.S. Citizenship and Immigration Services (USCIS) naturalized more than 600,000 legal permanent residents.
The USCIS received 710,544 applications for citizenship and naturalized 619,913 legal permanent residents in 2010 (See Figure 1, below).

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USCIS denied 56,990 naturalization petitions in 2010.
Applicants can be denied citizenship by USCIS for one or more of the following reasons: if the applicant cannot prove five years of permanent residence in the United States; if the applicant is found to lack allegiance to the United States; if the applicant is found to have bad moral character; or if the applicant fails the required English language or American civics test. Overall, the agency denied 56,990 applications in 2010.

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About 290,000 applications for naturalization were pending a decision at the end of 2010.
The number of applications pending a decision decreased from 480,000 at the end of 2008 to 290,000 by the end of 2010.

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The number of naturalizations decreased by 40.8 percent between 2008 and 2010.
In the period between 2008 and 2010, the number of naturalizations decreased 40.8 percent. In 2009, there were 743,715 naturalizations, a decrease of about 28.9 percent from 2008, and in 2010 there were a total of 619,913 naturalizations, a decrease of 16.6 percent from 2009.


Figure 1. Annual Number of New U.S. Citizens, 1978 to 2010
Source: Yearbook of Immigration Statistics, 2010. Available online.


In interpreting the data presented in Figure 1, it is important to note that the increased number of naturalizations in the second half of the 1990s resulted in part from legislation passed in 1986 and 1996. Under the 1986 Immigration Reform and Control Act (IRCA), 2.7 million unauthorized immigrants received lawful permanent resident (LPR) status, increasing the pool of those eligible for naturalization.

Furthermore, three federal laws that Congress passed in 1996 prompted more immigrants to naturalize. These laws — the Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA), the Illegal Immigration Reform and Immigrant Responsibility Act (IIRIRA), and the Anti-Terrorism and Effective Death Penalty Act (AEDPA) — limited access to public benefits and legal protections for noncitizens

The sharp increase in naturalizations of about 58.5 percent between 2007 and 2008 (from 660,477 to 1,046,539) is a result of the promotion of naturalization during the 2008 presidential elections and impending increases in the fees assessed for applicants, which worked to encourage a surge in applications for naturalizations during that time period.

Since 1996, the number of people naturalizing every year has not always matched the number of people applying for naturalization due to delays in application processing. Therefore, readers have to exercise caution in interpreting trends in naturalization over time.

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In 2010, immigrants from Mexico, India, the Philippines, and China accounted for almost one-third of all naturalizations.
Of all immigrants who naturalized in 2010, 10.8 percent were born in Mexico (67,062), 9.9 percent in India (61,142), 5.7 percent in the Philippines (35,465), and 5.5 in China (33,969). Nationals of these four countries, together with those from Vietnam (19,313, or 3.1 percent), Columbia (18,417, or 3.0 percent), the Dominican Republic (15,451, or 2.5 percent), Cuba (14,050, or 2.3 percent), Haiti (12,291, or 2.0 percent), and Jamaica (12,070, or 1.9 percent), accounted for 46.7 percent (289,230) of all naturalizations in 2010. (See Figure 2.1).

Three countries that had previously been among the top ten origin nations for new U.S. citizens in 2000 — Korea, Iran, and El Salvador — were replaced by Colombia, Cuba, and Haiti in 2010, while the other seven of the top ten from 2000 remained in place (see Figure 2.2).


Figure 2.1. Top 10 Countries of Birth for Naturalizations in the United States, 2010
Source: Yearbook of Immigration Statistics, 2010. Available online.



Figure 2.2. Top 10 Countries of Birth for Naturalizations in the United States, 2000
Source: Yearbook of Immigration Statistics, 2008. Available online.


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Of all Mexican immigrants naturalized in 2010, nearly 70 percent resided in California, Texas, Illinois, and Arizona.
More than one-third (36.5 percent) of the 67,062 Mexican-born LPRs naturalized in 2010 resided in California (24,446), while 21.5 percent resided in Texas (14,416), 6.2 percent in Illinois (4,134), and 5.6 percent in Arizona (3,768).

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Half of all foreign born who naturalized in 2010 lived in four states: California, New York, Florida, and Texas.
In 2010, 20.9 percent of all immigrants who naturalized lived in California (129,354), 11.0 percent lived in New York (67,972), 10.9 percent resided in Florida (67,484), and 8.0 percent were in Texas (49,699). (See Table 1).


Table 1. Top 10 States with the Largest Numbers of Naturalizations, 2001 to 2010
Rank State of residence 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
  United States 606,259 572,646 462,435 537,151 604,280 702,589 660,477 1,046,539 743,715 619,913
1 California 202,668 149,213 135,599 145,593 170,489 152,836 181,684 297,909 179,754 129,354
2 New York 98,858 94,181 63,888 66,234 84,624 103,870 73,676 90,572 88,733 67,972
3 Florida 48,577 44,732 35,105 43,795 42,999 90,846 54,563 128,328 82,788 67,484
4 Texas 43,287 42,767 28,638 35,417 38,553 37,835 53,032 82,129 54,024 49,699
5 New Jersey 26,730 26,760 22,968 30,291 33,160 39,801 35,235 59,950 35,077 33,864
6 Illinois 32,256 32,585 23,401 29,432 27,739 30,156 38,735 45,224 28,112 26,180
7 Massachusetts 17,596 18,024 11,461 16,263 22,685 22,932 20,952 28,728 21,748 21,095
8 Georgia 3,223 11,066 11,068 6,880 7,903 19,785 14,181 20,417 15,408 18,253
9 Virginia 7,414 10,598 9,583 13,478 17,653 20,401 14,171 29,949 24,730 17,815
10 Washington 8,778 9,335 11,787 12,667 14,817 12,762 14,671 18,665 19,853 16,830
  Other states 116,872 133,385 108,937 137,101 143,658 171,365 159,577 244,668 193,488 171,367
Note: States are ranked by 2010 numbers. Source: Yearbook of Immigration Statistics, 2010. Available online.


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Wyoming had the fewest naturalizations of all states in 2010.
In Wyoming, just 229 legal permanent residents naturalized in 2010. The next-lowest numbers of naturalizations were in Montana (259) and North Dakota (286).

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The New York, Los Angeles, Miami, and Chicago metropolitan areas were home to more than one-third of all immigrants who naturalized in 2010.
Around 15 percent of all those who naturalized in 2010 lived in the greater New York metropolitan area (91,257), 8.4 percent resided in the greater Los Angeles metropolitan area (51,977), and 6.8 percent lived in the greater Miami metropolitan area (42,220). These metropolitan areas, together with the metropolitan areas of Chicago (4.0 percent), Washington (4.0 percent), San Francisco (3.4 percent), Houston (3.0 percent), Boston (2.7 percent), and Dallas (2.7 percent), were home to roughly half (49.8 percent) of all new U.S. citizens in 2010.

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The median number of years of residence between the date of legal immigration and the date of naturalization was six years in 2010.
Among persons who became U.S. citizens in 2010, the median number of years of residence between the date of legal immigration and naturalization was six years. The median time of residence for new citizens in 2009 was seven years, while the corresponding figure in 2008 was nine years.

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A July 2002 executive order made noncitizen members of the armed forces eligible for expedited U.S. citizenship.
Section 329 of the Immigration and Nationality Act authorizes the president to issue executive orders specifying periods of conflict during which foreign-born members of the U.S. military are eligible for immediate U.S. citizenship.

In a July 2002 executive order, President George W. Bush specified that such a period of hostilities began after September 11, 2001, and that foreign-born, noncitizen military personnel serving on or after that date were thus eligible for expedited citizenship. During times of peace, noncitizen armed forces members may obtain citizenship after a one-year waiting period.

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Almost 69,000 immigrant service members have become U.S. citizens since September 2001.
Since September 2001, 59,647 foreign-born military personnel have naturalized on U.S. soil. Another 9,327 have become citizens overseas or aboard U.S. Navy ships.

Between 2005 and 2011, the majority of foreign-born service members naturalizing overseas were naturalized in Iraq (3,379 individuals), Japan (1,777 individuals), and Germany (1,272 individuals). Nearly 900 persons were naturalized in Afghanistan during the same period.

Since August 2002, USCIS has also granted posthumous citizenship to 132 members of the military.

(Source: USCIS, "Fact Sheet: Naturalization through Military Service." Available online.)

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Additional Resources

DHS Office of Immigration Statistics: Data on Naturalizations, FY 2010. Available online.

Rytina, Nancy (2010). "Estimates of the Legal Permanent Resident Population in 2009." USCIS, February. Available online.

USCIS, "Fact Sheet: Naturalization through Military Service." Available online.

Definitions of terms can be found at the website of the Department of Homeland Security.