Dillon Beach is a census-designated place (CDP) in Marin County, California, United States. It is located west of Tomales, at an elevation of .
Geography
Dillon Beach is located at Bodega Bay (near the mouth of Tomales Bay), at . It is the only private beach in California.
Demographics
Dillon Beach 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)
|297
|257
|style='background: #ffffe6; |210
|93.10%
|90.81%
|style='background: #ffffe6; |85.37%
|-
|Black or African American alone (NH)
|1
|0
|style='background: #ffffe6; |1
|0.31%
|0.00%
|style='background: #ffffe6; |0.41%
|-
|Native American or Alaska Native alone (NH)
|1
|3
|style='background: #ffffe6; |0
|0.31%
|1.06%
|style='background: #ffffe6; |0.00%
|-
|Asian alone (NH)
|9
|4
|style='background: #ffffe6; |6
|2.82%
|1.41%
|style='background: #ffffe6; |2.44%
|-
|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)
|1
|0
|style='background: #ffffe6; |1
|0.31%
|0.00%
|style='background: #ffffe6; |0.41%
|-
|Mixed race or Multiracial (NH)
|7
|10
|style='background: #ffffe6; |11
|2.19%
|3.53%
|style='background: #ffffe6; |4.47%
|-
|Hispanic or Latino (any race)
|3
|9
|style='background: #ffffe6; |17
|0.94%
|3.18%
|style='background: #ffffe6; |6.91%
|-
|Total
|319
|283
|style='background: #ffffe6; |246
|100.00%
|100.00%
|style='background: #ffffe6; |100.00%
|}
2020 census
The 2020 United States census reported that Dillon Beach had a population of 246. The population density was . The racial makeup of Dillon Beach was 214 (87.0%) White, 1 (0.4%) African American, 1 (0.4%) Native American, 6 (2.4%) Asian, 0 (0.0%) Pacific Islander, 3 (1.2%) from other races, and 21 (8.5%) from two or more races. Hispanic or Latino of any race were 17 persons (6.9%).
The whole population lived in households. There were 114 households, out of which 23 (20.2%) had children under the age of 18 living in them, 64 (56.1%) were married-couple households, 7 (6.1%) were cohabiting couple households, 27 (23.7%) had a female householder with no partner present, and 16 (14.0%) had a male householder with no partner present. 30 households (26.3%) were one person, and 17 (14.9%) were one person aged 65 or older. The average household size was 2.16.
The age distribution was 29 people (11.8%) under the age of 18, 11 people (4.5%) aged 18 to 24, 40 people (16.3%) aged 25 to 44, 88 people (35.8%) aged 45 to 64, and 78 people (31.7%) who were 65years of age or older. The median age was 57.5years. For every 100 females, there were 103.3 males.
The census reported that 100% of the population lived in households.
There were 147 households, 20 (13.6%) had children under the age of 18 living in them, 79 (53.7%) were opposite-sex married couples living together, 6 (4.1%) had a female householder with no husband present, 2 (1.4%) had a male householder with no wife present. There were 6 (4.1%) unmarried opposite-sex partnerships, and 3 (2.0%) same-sex married couples or partnerships. 48 households (32.7%) were one person and 26 (17.7%) had someone living alone who was 65 or older. The average household size was 1.93. There were 87 families (59.2% of households); the average family size was 2.37.
The age distribution was 28 people (9.9%) under the age of 18, 7 people (2.5%) aged 18 to 24, 44 people (15.5%) aged 25 to 44, 127 people (44.9%) aged 45 to 64, and 77 people (27.2%) who were 65 or older. The median age was 57.4 years. For every 100 females, there were 95.2 males. For every 100 females age 18 and over, there were 94.7 males.
There were 440 housing units at an average density of 147.5 per square mile, of the occupied units 125 (85.0%) were owner-occupied and 22 (15.0%) were rented. The homeowner vacancy rate was 5.3%; the rental vacancy rate was 59.3%. 84.5% of the population lived in owner-occupied housing units and 15.5% lived in rental housing units.
Education
Dillon Beach is served by the Shoreline Unified School District.