E.g., 07/28/2021
E.g., 07/28/2021
Profile of the Unauthorized Population - County Data (6085)

Profile of the Unauthorized Population:
Santa Clara County, CA

DemographicsEstimate% of Total
Unauthorized Population 134,000 100%
Top Countries of Birth
Mexico 65,000 48%
India 23,000 17%
China/Hong Kong 12,000 9%
Philippines 6,000 4%
El Salvador 4,000 3%
Regions of Birth
Mexico and Central America 73,000 54%
Caribbean- -
South America 3,000 2%
Europe/Canada/Oceania 8,000 6%
Asia 50,000 37%
Africa- -
Years of U.S. Residence
Less than 5 25,000 18%
5 to 9 30,000 23%
10 to 14 33,000 25%
15 to 19 29,000 22%
20 or more 17,000 13%
Under 16 7,000 5%
16 to 24 16,000 12%
25 to 34 43,000 32%
35 to 44 42,000 32%
45 to 54 17,000 13%
55 and over 9,000 7%
Female 61,000 46%
FamilyEstimate% of Total
Parental Status
Population ages 15 and older 128,000 100%
Reside with at least one U.S.-citizen child under 18 49,000 38%
Reside with noncitizen children only under 18 8,000 6%
Reside with no children 72,000 56%
Marital Status
Population ages 15 and older 128,000 100%
Never married 46,000 36%
Married to a U.S. citizen 17,000 13%
Married to a legal permanent resident (LPR) 11,000 8%
Married to non-U.S. citizen/non-LPR 38,000 30%
Divorced, separated, widowed 15,000 12%
Education and LanguageEstimate% of Total
School Enrollment of Children and Youth
Population ages 3 to 17 8,000 100%
Enrolled 8,000 93%
Not enrolled- -
Population ages 3 to 12 4,000 100%
Enrolled 4,000 90%
Not enrolled- -
Population ages 13 to 17 4,000 100%
Enrolled 4,000 96%
Not enrolled- -
Population ages 18 to 24 14,000 100%
Enrolled 7,000 52%
Not enrolled 7,000 48%
Educational Attainment of Adults
Population ages 25 and older 112,000 100%
0-5 grade 10,000 9%
6-8 grade 13,000 12%
9-12 grade 11,000 10%
High school diploma or equivalent 22,000 20%
Some college or associate’s degree 12,000 11%
Bachelor’s, graduate, or professional degree 43,000 39%
English Proficiency
Population ages 5 and older 133,000 100%
Speak only English 9,000 6%
Speak English "very well" 49,000 37%
Speak English "well" 34,000 26%
Speak English "not well"/"not at all" 41,000 31%
Top 5 Languages Spoken at Home
Population ages 5 and older 133,000 100%
Spanish 73,000 55%
Chinese 12,000 9%
English 9,000 7%
Hindi 7,000 6%
Tagalog 5,000 4%
WorkforceEstimate% of Total
Labor Force Participation
Civilian population ages 16 and older 127,000 100%
Employed 89,000 70%
Unemployed 5,000 4%
Not in the labor force 33,000 26%
Top Industries of Employment
Civilian employed population ages 16 and older 89,000 100%
Professional, scientific, management, administrative, and waste management services 20,000 23%
Accommodation and food services, arts, entertainment, and recreation 14,000 16%
Construction 12,000 14%
Manufacturing 12,000 13%
Retail trade 7,000 7%
EconomicsEstimate% of Total
Family Income
Below 50% of the poverty level 9,000 7%
50-99% of the poverty level 10,000 7%
100-149% of the poverty level 14,000 11%
150-199% of the poverty level 14,000 10%
At or above 200% of the poverty level 87,000 65%
Access to Health Insurance
Uninsured 31,000 23%
Home Ownership*
Homeowner 36,000 27%


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.