Delleker is a census-designated place (CDP) in Plumas County, California, United States. The population was 802 at the 2020 census,
According to the United States Census Bureau, the CDP has a total area of , of which 99.93% is land and 0.07% is water.<br> 1860–1870 1880-1890<br> 1900 1910 1920<br> 1930 1940 1950<br> 1960 1970 1980<br> 1990
2000 2010
Delleker first appeared as a census designated place in the 2000 U.S. census.
!Pop 2010
!style="background-color: #ffffb3;" |Pop 2020
!% 2000
!% 2010
!style="background-color: #ffffb3;" |% 2020
|-
|White alone (NH)
|504
|467
|style='background: #ffffe6; |503
|74.78%
|66.24%
|style='background: #ffffe6; |62.72%
|-
|Black or African American alone (NH)
|5
|7
|style='background: #ffffe6; |2
|0.74%
|0.99%
|style='background: #ffffe6; |0.25%
|-
|Native American or Alaska Native alone (NH)
|20
|15
|style='background: #ffffe6; |20
|2.97%
|2.13%
|style='background: #ffffe6; |2.49%
|-
|Asian alone (NH)
|2
|3
|style='background: #ffffe6; |6
|0.30%
|0.43%
|style='background: #ffffe6; |0.75%
|-
|Native Hawaiian or Pacific Islander alone (NH)
|0
|0
|style='background: #ffffe6; |0
|0.00%
|0.00%
|style='background: #ffffe6; |0.00%
|-
|Other race alone (NH)
|4
|1
|style='background: #ffffe6; |8
|0.59%
|0.14%
|style='background: #ffffe6; |1.00%
|-
|Mixed race or Multiracial (NH)
|30
|26
|style='background: #ffffe6; |27
|4.45%
|3.69%
|style='background: #ffffe6; |3.37%
|-
|Hispanic or Latino (any race)
|109
|186
|style='background: #ffffe6; |236
|16.17%
|26.38%
|style='background: #ffffe6; |29.43%
|-
|Total
|674
|705
|style='background: #ffffe6; |802
|100.00%
|100.00%
|style='background: #ffffe6; |100.00%
|}
The 2020 United States census reported that Delleker had a population of 802. The population density was . The racial makeup of Delleker was 568 (70.8%) White, 2 (0.2%) African American, 30 (3.7%) Native American, 8 (1.0%) Asian, 0 (0.0%) Pacific Islander, 104 (13.0%) from other races, and 90 (11.2%) from two or more races. Hispanic or Latino of any race were 236 persons (29.4%).
The whole population lived in households. There were 296 households, out of which 89 (30.1%) had children under the age of 18 living in them, 134 (45.3%) were married-couple households, 18 (6.1%) were cohabiting couple households, 78 (26.4%) had a female householder with no partner present, and 66 (22.3%) had a male householder with no partner present. 109 households (36.8%) were one person, and 55 (18.6%) were one person aged 65 or older. The average household size was 2.71.
The age distribution was 221 people (27.6%) under the age of 18, 55 people (6.9%) aged 18 to 24, 196 people (24.4%) aged 25 to 44, 199 people (24.8%) aged 45 to 64, and 131 people (16.3%) who were 65years of age or older. The median age was 38.0years. For every 100 females, there were 95.6 males. and .
Federally, Delleker is in .
Education
The school district is Plumas Unified School District.