Rosemont is home to 23,766 people in California. Few US cities rank higher on income. Density works out to 5,417 people per square mile. This skews young, with a median age of 35.6. About 29% of adults have finished a four-year degree. Renters pay $1,831 a month at the median.
At a glance
Wealthier
median household income $90,046, above the US median
US median: $82,259
Younger
median age 35.6
US median: 38.9
Less educated
29% hold a bachelor's degree
US average: 36%
Less affordable
home values up 107%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Rosemont
What changed most since 1990
Poverty rate7.3% → 16.6%(+9.3 pts)US over the same years: −0.8 pts
White share70.0% → 42.2%(−27.7 pts)US over the same years: −17.8 pts
Homes owned by their occupants55.5% → 61.5%(+6.0 pts)US over the same years: +0.9 pts
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)28.5%(337)
US avg: 26.4%
Gulf War (1990s)28.2%(333)
US avg: 24.3%
Vietnam era41.8%(494)
US avg: 33.1%
Korean War3.9%(46)
US avg: 4.5%
World War II1%(12)
US avg: 1%
Share of the 1,181 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Rosemont, decade by decade
Rosemont population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
22,851
$88,188
$297,849
26.2%
60.4
2000
22,904
$82,055
$222,242
25.5%
75.8
2010
22,681
$82,344
$389,709
23.3%
83.7
2020
23,510
$88,680
$396,216
30.3%
89.5
2024
23,766
$90,046
$460,700
29.1%
90.9
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
