E.g., 10/17/2021
E.g., 10/17/2021
Profile of the Unauthorized Population - CT

Profile of the Unauthorized Population:

DemographicsEstimate% of Total
Unauthorized Population 116,000 100%
Top Countries of Birth
Mexico 21,000 18%
Guatemala 13,000 11%
Ecuador 8,000 7%
Brazil 8,000 7%
India 8,000 7%
Regions of Birth
Mexico and Central America 43,000 37%
Caribbean 13,000 11%
South America 29,000 25%
Europe/Canada/Oceania 12,000 11%
Asia 16,000 13%
Africa 3,000 2%
Years of U.S. Residence
Less than 5 28,000 24%
5 to 9 28,000 24%
10 to 14 26,000 22%
15 to 19 23,000 20%
20 or more 11,000 9%
Under 16 7,000 6%
16 to 24 18,000 15%
25 to 34 34,000 30%
35 to 44 32,000 28%
45 to 54 16,000 14%
55 and over 9,000 7%
Female 52,000 45%
FamilyEstimate% of Total
Parental Status
Population ages 15 and older 110,000 100%
Reside with at least one U.S.-citizen child under 18 34,000 31%
Reside with noncitizen children only under 18 7,000 6%
Reside with no children 69,000 63%
Marital Status
Population ages 15 and older 110,000 100%
Never married 45,000 41%
Married to a U.S. citizen 16,000 15%
Married to a legal permanent resident (LPR) 7,000 6%
Married to non-U.S. citizen/non-LPR 24,000 22%
Divorced, separated, widowed 18,000 16%
Education and LanguageEstimate% of Total
School Enrollment of Children and Youth
Population ages 3 to 17 8,000 100%
Enrolled 8,000 97%
Not enrolled- -
Population ages 3 to 12 5,000 100%
Enrolled 4,000 96%
Not enrolled- -
Population ages 13 to 17 4,000 100%
Enrolled 4,000 97%
Not enrolled- -
Population ages 18 to 24 16,000 100%
Enrolled 7,000 41%
Not enrolled 9,000 59%
Educational Attainment of Adults
Population ages 25 and older 91,000 100%
0-5 grade 8,000 9%
6-8 grade 11,000 12%
9-12 grade 8,000 9%
High school diploma or equivalent 28,000 31%
Some college or associate’s degree 13,000 14%
Bachelor’s, graduate, or professional degree 24,000 26%
English Proficiency
Population ages 5 and older 115,000 100%
Speak only English 12,000 10%
Speak English "very well" 32,000 28%
Speak English "well" 31,000 27%
Speak English "not well"/"not at all" 40,000 35%
Top 5 Languages Spoken at Home
Population ages 5 and older 115,000 100%
Spanish 68,000 59%
English 12,000 11%
Portuguese 8,000 7%
Chinese 4,000 3%
Polish 2,000 2%
WorkforceEstimate% of Total
Labor Force Participation
Civilian population ages 16 and older 109,000 100%
Employed 76,000 70%
Unemployed 7,000 7%
Not in the labor force 26,000 24%
Top Industries of Employment
Civilian employed population ages 16 and older 76,000 100%
Construction 14,000 18%
Professional, scientific, management, administrative, and waste management services 14,000 18%
Accommodation and food services, arts, entertainment, and recreation 13,000 17%
Retail trade 7,000 10%
Health services and social assistance 6,000 8%
EconomicsEstimate% of Total
Family Income
Below 50% of the poverty level 11,000 10%
50-99% of the poverty level 13,000 11%
100-149% of the poverty level 13,000 12%
150-199% of the poverty level 15,000 13%
At or above 200% of the poverty level 64,000 55%
Access to Health Insurance
Uninsured 60,000 52%
Home Ownership*
Homeowner 28,000 24%


Source: These 2018 data result from Migration Policy Institute (MPI) analysis of U.S. Census Bureau data from the pooled 2014–18 American Community Survey (ACS) and the 2008 Survey of Income and Program Participation (SIPP), weighted to 2018 unauthorized immigrant population estimates provided by Jennifer Van Hook of The Pennsylvania State University.

Note: For U.S., state, and county estimates of the unauthorized population potentially eligible for the Deferred Action for Childhood Arrivals (DACA) program, click here.

Data-related notes
* “Homeowners” are unauthorized immigrants residing in homes that are owned, not rented.

+ Includes the following Colorado counties: Adams, Broomfield, Clear Creek, Douglas, Elbert, Gilpin, and Jefferson, as well as portions of Arapahoe, Boulder, and Weld counties.

++ NECTAs refer to New England City and Town Areas, geographic entities defined by the U.S. Census Bureau for use as alternatives to counties in the six-state New England region.

  1. Estimate for China includes Hong Kong but excludes Taiwan; estimate for Korea includes South Korea and North Korea.
  2. “School Enrollment of Children and Youth” refers to unauthorized immigrants who reported attending school or college at any time in the three months prior to the survey.
  3. For languages, “Chinese” includes Mandarin, Cantonese, and other Chinese languages; “English” includes English, Jamaican Creole, Krio, Pidgin Krio, and other English-based Creole languages; “French” includes French, Patois, and Cajun; “Pacific Island languages” includes Ilocano, Samoan, Hawaiian, Sebuano, Chamorro, Guamanian, Marshallese, Trukese, Tongan, and other Austronesian languages, but excludes Tagalog and Filipino, which are reported separately; “Portuguese” includes Portuguese and Cape Verdean Creole; “Sub-Saharan African” includes Swahili or other Bantu languages, Mande, Fulani, Kru, and other unspecified African languages; “Tagalog” includes Tagalog and Filipino.
  4.  For industries, “Other services” are miscellaneous services, not including the following services listed separately: (1) professional, scientific, management, administrative, and waste management services; (2) educational services; (3) health and social services; and (4) accommodation and food services, arts, entertainment, and recreation.
  5.  “-” estimates are zero, not applicable, or not displayed due to small sample size.
  6. Percentages may not add up to 100 due to rounding.

Methodology in Brief:

MPI’s method uses information from the SIPP to assign legal status to noncitizens in the ACS. In the SIPP, noncitizens report whether they currently have lawful permanent resident (LPR) status—i.e., a green card. Those without LPR status may be recent refugees, temporary visitors (e.g., international students or high-skilled H-1B workers), or unauthorized immigrants. Our method maps characteristics such as country of birth, year of U.S. entry, age, gender, and educational attainment between the two surveys, and those noncitizens in the ACS who have characteristics similar to those reporting LPR status in the SIPP are coded as LPRs in the ACS. The remaining noncitizens—who are similar in characteristics to those not reporting LPR status in the SIPP—are classified as either unauthorized or legal temporary migrants, depending on whether they meet the qualifications for H-1B and the other temporary visa classifications. Estimates of unauthorized immigrants are weighted to match control totals (benchmarks) for immigrants from a set of origin countries and world regions. These control totals are calculated by subtracting the number of legal immigrants from the total of all immigrants for each country and region that are captured in the ACS data. The number of legal immigrants is estimated by adding up all legal admissions from each country and region in every year—using Department of Homeland Security administrative data—and then reducing this number to account for deaths and emigration of legal immigrants. Finally, the unauthorized immigrant population estimates are adjusted upward slightly to account for the undercount of this population in the ACS.

MPI’s overall method was developed in consultation with James Bachmeier of Temple University and Jennifer Van Hook of The Pennsylvania State University, Population Research Institute. For more detail on the methods, see MPI, “MPI Methodology for Assigning Legal Status to Noncitizen Respondents in U.S. Census Bureau Survey Data.” The control totals were developed by Jennifer Van Hook. These estimates have the same sampling and coverage errors as any other survey-based estimates that rely on ACS and other Census Bureau data.