Lennox, California's estimated population is according to the most recent United States census estimates. Lennox, California is the -th largest city in California based on official 2017 estimates from the US Census Bureau.
The population density is 0.00 people/mi² (0.00 people/km²).
The overall median age is 29 years, 28.1 years for males, and 30.1 years for females. For every 100 females there are 96.6 males.
Based on data from the American Community Survey, in 2017 there were households in the city, with an average size of 4.05 people per household. The homeowner vacancy rate was %, with a median rent of $/month. The median house has rooms, and has a value of $.
The median income for households in Lennox, California is $41,022, while the mean household income is $52,986.
According to the most recent ACS, the racial composition of Lennox Ca was:
| Race | Population |
| Some Other Race | 9,944 |
| White | 9,847 |
| Black or African American | 644 |
| Two or More Races | 437 |
| Asian | 409 |
| American Indian and Alaska Native | 256 |
| Type | Count | Average Size | Owned |
| All | 5,311 | 4.05 | 29 |
| Married | 2,589 | 4.68 | 36.1 |
| Female | 1,177 | 4.46 | 25.1 |
| Non Family | 796 | 1.31 | 22.9 |
| Male | 749 | 4.18 | 17.2 |
| Education Attained | Count | Percentage |
| Less Than 9th Grade | 3,935 | 31.73% |
| 9th to 12th Grade | 2,372 | 19.12% |
| High School Graduate | 2,960 | 23.87% |
| Some College | 1,854 | 14.95% |
| Associates Degree | 451 | 3.64% |
| Bachelors Degree | 679 | 5.47% |
| Graduate Degree | 152 | 1.23% |
| Name | Total | High School | Bachelors |
| Hispanic | 11,466 | 5,303 | 637 |
| Other Race | 6,009 | 3,005 | 391 |
| White | 341 | 265 | 67 |
| Black | 307 | 239 | 19 |
| Asian | 221 | 221 | 102 |
| Multiple Races | 220 | 79 | 9 |
| Native American | 117 | 79 | 41 |
The highest rate of high school graduation is among asian people with a rate of 100.00%.
The highest rate of bachelors degrees is among asian people with a rate of 46.15%.
8.99% of Lennox Ca residents speak only English, while 91.01% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 88.57% of the population.
| Name | Total | In Poverty | Poverty Rate |
| Hispanic | 20,085 | 5,443 | 27.10% |
| Other | 9,926 | 2,247 | 22.64% |
| Black | 644 | 438 | 68.01% |
| Multiple | 437 | 226 | 51.72% |
| Native | 256 | 69 | 26.95% |
| White | 341 | 41 | 12.02% |
| Asian | 409 | 35 | 8.56% |
27.58%
Overall Poverty Rate
25.18%
Male Poverty Rate
29.90%
Female Poverty Rate
The race most likely to be in poverty in Lennox Ca is Black, with 68.01% below the poverty level.
The race least likely to be in poverty in Lennox Ca is Asian, with 8.56% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 8.48%. Among those working part-time, it was 28.70%, and for those that did not work, the poverty rate was 37.95%.
41.9%
Overall Marriage Rate
44.1%
Male Marriage Rate
39.7%
Female Marriage Rate
The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 55-64.
| Name | Veterans | % of Total |
| Hispanic | 138 | 0.97% |
| White | 111 | 1.63% |
| Other | 87 | 1.19% |
| Black | 7 | 1.75% |
22.44%
Veteran Poverty Rate
7.80%
Veteran Disability Rate
68.4%
Labor Force Participation
61.8%
Employment Rate
9.6%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
54.37%
Native Born
45.63%
Foreign Born
30.55%
Non Citizen
54.37% of Lennox Ca residents were born in the United States, with 52.01% having been born in California. 30.55% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.