Mountain Mesa (often shortened to Mt. Mesa) is a census-designated place (CDP) in Kern County, California, United States. Mountain Mesa is located west of South Lake at an elevation of .<br> 1860–1870 1880-1890<br> 1900 1910 1920<br> 1930 1940 1950<br> 1960 1970 1980<br> 1990 2000 2010<br> 2020
!Pop 2010
!style="background-color: #ffffb3;" |Pop 2020
!% 2000
!% 2010
!style="background-color: #ffffb3;" |% 2020
|-
|White alone (NH)
|663
|647
|style='background: #ffffe6; |664
|92.60%
|83.27%
|style='background: #ffffe6; |80.68%
|-
|Black or African American alone (NH)
|2
|7
|style='background: #ffffe6; |5
|0.28%
|0.90%
|style='background: #ffffe6; |0.61%
|-
|Native American or Alaska Native alone (NH)
|2
|12
|style='background: #ffffe6; |10
|0.28%
|1.54%
|style='background: #ffffe6; |1.22%
|-
|Asian alone (NH)
|0
|6
|style='background: #ffffe6; |7
|0.00%
|0.77%
|style='background: #ffffe6; |0.85%
|-
|Native Hawaiian or Pacific Islander alone (NH)
|1
|2
|style='background: #ffffe6; |1
|0.14%
|0.26%
|style='background: #ffffe6; |0.12%
|-
|Other race alone (NH)
|0
|0
|style='background: #ffffe6; |2
|0.00%
|0.00%
|style='background: #ffffe6; |0.24%
|-
|Mixed race or Multiracial (NH)
|21
|26
|style='background: #ffffe6; |50
|2.93%
|3.35%
|style='background: #ffffe6; |6.08%
|-
|Hispanic or Latino (any race)
|27
|77
|style='background: #ffffe6; |84
|3.77%
|9.91%
|style='background: #ffffe6; |10.21%
|-
|Total
|716
|777
|style='background: #ffffe6; |823
|100.00%
|100.00%
|style='background: #ffffe6; |100.00%
|}
The 2020 United States census reported that Mountain Mesa had a population of 823. The population density was . The racial makeup of Mountain Mesa was 705 (85.7%) White, 5 (0.6%) African American, 11 (1.3%) Native American, 7 (0.9%) Asian, 1 (0.1%) Pacific Islander, 25 (3.0%) from other races, and 69 (8.4%) from two or more races. Hispanic or Latino of any race were 84 persons (10.2%).
The census reported that 765 people (93.0% of the population) lived in households and 58 (7.0%) were institutionalized.
The age distribution was 136 people (16.5%) under the age of 18, 40 people (4.9%) aged 18 to 24, 156 people (19.0%) aged 25 to 44, 269 people (32.7%) aged 45 to 64, and 222 people (27.0%) who were 65years of age or older. The median age was 51.9years. For every 100 females, there were 100.7 males.
The census reported that 715 people (92.0% of the population) lived in households, no one lived in non-institutionalized group quarters and 62 (8.0%) were institutionalized.
There were 304 households, 80 (26.3%) had children under the age of 18 living in them, 139 (45.7%) were opposite-sex married couples living together, 26 (8.6%) had a female householder with no husband present, 27 (8.9%) had a male householder with no wife present. There were 18 (5.9%) unmarried opposite-sex partnerships, and 5 (1.6%) same-sex married couples or partnerships. 88 households (28.9%) were one person and 44 (14.5%) had someone living alone who was 65 or older. The average household size was 2.35. There were 192 families (63.2% of households); the average family size was 2.88.
The age distribution was 155 people (19.9%) under the age of 18, 51 people (6.6%) aged 18 to 24, 133 people (17.1%) aged 25 to 44, 222 people (28.6%) aged 45 to 64, and 216 people (27.8%) who were 65 or older. The median age was 49.8 years. For every 100 females, there were 101.3 males. For every 100 females age 18 and over, there were 93.2 males.
There were 368 housing units at an average density of 442.7 per square mile, of the occupied units 235 (77.3%) were owner-occupied and 69 (22.7%) were rented. The homeowner vacancy rate was 2.9%; the rental vacancy rate was 18.6%. 520 people (66.9% of the population) lived in owner-occupied housing units and 195 people (25.1%) lived in rental housing units.
2000
At the 2000 census, the median household income was $23,875 and the median family income was $32,656. Males had a median income of $26,161 versus $14,797 for females. The per capita income for the CDP was $13,759. About 28.9% of families and 27.7% of the population were below the poverty line, including 59.2% of those under age 18 and 31.5% of those age 65 or over.