Castle Hill vs Diablo

A side-by-side comparison of Castle Hill and Diablo: population, income, housing, and more.

Castle Hill and Diablo are places in California. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Castle Hill has the higher population (1,303 vs 1,072 in Diablo). Both have a median home value of $2,000,001. Since 2019, Diablo's population has grown faster (+139.3% vs -8.6%).

Population, income & housing

	Castle Hill	Diablo
Population	1,303	1,072
Median age	42.6 yrs	37.7 yrs
Median household income	$250,001	—
Median home value	$2,000,001	$2,000,001
Housing units	428	422
Homeownership rate	96.0%	100.0%
Bachelor's degree or higher	79.2%	84.1%
Unemployment rate	0.0%	7.7%

Trends (ACS 5-year, 2019–2023)

	Castle Hill	Diablo
Population	1,426 → 1,303 (-8.6%)	448 → 1,072 (+139.3%)
Median household income	$204,879 → $250,001 (+22.0%)	$143,616 → $250,001 (+74.1%)
Median home value	$1,290,600 → $2,000,001 (+55.0%)	$2,000,001 → $2,000,001 (+0.0%)

Castle Hill

Population

1,4261,303

Median household income

$204,879$250,001

Median home value

$1,290,600$2,000,001

Diablo

Population

4481,072

Median household income

$143,616$250,001

Median home value

$2,000,001$2,000,001

Age & race/ethnicity

Age distribution (share)

	Castle Hill	Diablo
Under 5	5.1%	7.2%
5 to 17	27.1%	19.1%
18 to 24	5.4%	6.8%
25 to 34	1.2%	1.3%
35 to 44	15.3%	29.1%
45 to 54	21.0%	5.0%
55 to 64	7.6%	19.0%
65 to 74	12.1%	0.0%
75 and over	5.2%	12.4%

Race & ethnicity (share)

	Castle Hill	Diablo
White (non-Hispanic)	68.8%	79.8%
Black or African American	1.8%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	15.0%	1.6%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	7.3%
Two or more races	10.3%	1.5%
Hispanic or Latino	4.1%	9.9%

Educational attainment (age 25+)

Share of adults 25+

	Castle Hill	Diablo
No high school diploma	0.0%	0.0%
High school graduate	6.8%	2.2%
Some college or associate's	14.0%	13.7%
Bachelor's degree	52.2%	27.6%
Graduate or professional degree	27.0%	56.5%

Commute to work

How workers get to work (share)

	Castle Hill	Diablo
Drove alone	37.3%	62.9%
Carpooled	0.0%	8.6%
Public transit	7.1%	15.1%
Walked	0.0%	9.5%
Bicycle	0.0%	0.0%
Worked from home	53.3%	3.9%
Other means	2.3%	0.0%

Housing

Units in structure (share)

	Castle Hill	Diablo
1-unit, detached	93.7%	100.0%
1-unit, attached	6.3%	0.0%
2 to 4 units	0.0%	0.0%
5 to 19 units	0.0%	0.0%
20 or more units	0.0%	0.0%
Mobile home & other	0.0%	0.0%

Poverty & households

	Castle Hill	Diablo
Poverty rate	0.4%	9.9%
Average household size	3.03	2.78
Mean commute (minutes)	30	39
Median year structure built	1960	1982