Delleker is a census-designated place (CDP) in Plumas County, California, USA. The population was 802 at the 2020 census, up from 705 at the 2010 census.
Delleker is located at (39.811343, -120.497651).
According to the United States Census Bureau, the CDP has a total area of , of which, 99.93% of it is land and 0.07% is water.
Delleker first appeared as a census designated place in the 2000 U.S. census.
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. There were 169 families (57.1% of all households).
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.
There were 339 housing units at an average density of , of which 296 (87.3%) were occupied. Of these, 190 (64.2%) were owner-occupied, and 106 (35.8%) were occupied by renters.
In the state legislature, Delleker is in , and .
Federally, Delleker is in .
The school district is Plumas Unified School District.