Altadena vs Monrovia

A side-by-side comparison of Altadena and Monrovia: population, income, housing, and more.

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

Altadena has the higher population (41,921 vs 37,553 in Monrovia). Altadena has the higher median household income ($129,123 vs $97,083 in Monrovia). Altadena has the higher median home value ($1,073,500 vs $891,700 in Monrovia).

Population, income & housing

	Altadena	Monrovia
Population	41,921	37,553
Median age	46.2 yrs	38.3 yrs
Median household income	$129,123	$97,083
Median home value	$1,073,500	$891,700
Median gross rent	$2,250	$2,009
Housing units	15,744	14,796
Homeownership rate	78.3%	47.9%
Bachelor's degree or higher	52.7%	43.8%
Unemployment rate	7.3%	5.2%

Trends (ACS 5-year, 2019–2023)

	Altadena	Monrovia
Population	44,850 → 41,921 (-6.5%)	36,816 → 37,553 (+2.0%)
Median household income	$98,693 → $129,123 (+30.8%)	$77,111 → $97,083 (+25.9%)
Median home value	$742,800 → $1,073,500 (+44.5%)	$663,400 → $891,700 (+34.4%)
Median gross rent	$1,692 → $2,250 (+33.0%)	$1,590 → $2,009 (+26.4%)

Altadena

Population

44,85041,921

Median household income

$98,693$129,123

Median home value

$742,800$1,073,500

Median gross rent

$1,692$2,250

Monrovia

Population

36,81637,553

Median household income

$77,111$97,083

Median home value

$663,400$891,700

Median gross rent

$1,590$2,009

Age & race/ethnicity

Age distribution (share)

	Altadena	Monrovia
Under 5	5.0%	6.2%
5 to 17	13.7%	15.7%
18 to 24	5.5%	6.0%
25 to 34	11.4%	15.5%
35 to 44	13.0%	15.5%
45 to 54	13.9%	12.3%
55 to 64	16.1%	14.9%
65 to 74	11.2%	8.2%
75 and over	10.2%	5.7%

Race & ethnicity (share)

	Altadena	Monrovia
White (non-Hispanic)	41.7%	30.0%
Black or African American	17.6%	6.1%
American Indian & Alaska Native	0.1%	0.2%
Asian	5.3%	15.5%
Native Hawaiian & Pacific Islander	0.0%	0.3%
Some other race	1.0%	0.8%
Two or more races	7.0%	4.0%
Hispanic or Latino	27.2%	43.1%

Educational attainment (age 25+)

Share of adults 25+

	Altadena	Monrovia
No high school diploma	7.2%	9.8%
High school graduate	14.9%	18.4%
Some college or associate's	25.3%	28.0%
Bachelor's degree	26.9%	26.6%
Graduate or professional degree	25.7%	17.2%

Commute to work

How workers get to work (share)

	Altadena	Monrovia
Drove alone	65.3%	71.0%
Carpooled	6.4%	7.2%
Public transit	1.5%	2.2%
Walked	1.1%	1.5%
Bicycle	0.3%	0.2%
Worked from home	23.4%	16.6%
Other means	1.9%	1.3%

Housing

Units in structure (share)

	Altadena	Monrovia
1-unit, detached	87.5%	58.9%
1-unit, attached	4.7%	8.6%
2 to 4 units	4.3%	9.4%
5 to 19 units	1.2%	10.6%
20 or more units	2.4%	10.9%
Mobile home & other	0.0%	1.5%

Poverty & households

	Altadena	Monrovia
Poverty rate	7.4%	10.5%
Average household size	2.73	2.66
Mean commute (minutes)	27	30
Median year structure built	1945	1962