Walnut Population

1960–2026

27,056

2026 projection

4.8% since 2020 (decrease)

05K10K15K20K25K30K35K1960197019801990200020102020

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Walnut. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202627,056-2600.95%
202527,316+60.02%
202427,310+230.08%
202327,287-1570.57%
202227,444-3351.21%
202127,779-6512.29%
202028,430-2820.98%
201928,712-3571.23%
201829,069-1840.63%
201729,253-1110.38%

Showing 10 of 22 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Walnut has a population change lower than Los Angeles County, California, and the U.S.

  • United States+3.1%
  • California−0.4%
  • Los Angeles County−3.0%
  • Walnut−3.6%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Walnut Demographics

46.8median age

Median age

Female49.1 yrs
Male44.5 yrs

Adults

22,155
6,630 seniors (65+) · 30% of adults15,525 other adults

Sex

Female 49.6% · 13,694Male 50.4% · 13,917

Population by age

MaleFemale85+ years, male: 22285+ years, female: 25180–84 years, male: 30880–84 years, female: 27675–79 years, male: 52575–79 years, female: 51070–74 years, male: 97870–74 years, female: 93565–69 years, male: 1,19965–69 years, female: 1,42660–64 years, male: 1,05460–64 years, female: 1,30955–59 years, male: 92555–59 years, female: 1,20450–54 years, male: 81250–54 years, female: 77145–49 years, male: 85245–49 years, female: 86940–44 years, male: 70440–44 years, female: 88635–39 years, male: 79135–39 years, female: 67030–34 years, male: 70130–34 years, female: 57825–29 years, male: 86825–29 years, female: 77920–24 years, male: 77920–24 years, female: 47115–19 years, male: 68215–19 years, female: 68910–14 years, male: 1,13210–14 years, female: 6915–9 years, male: 8325–9 years, female: 8340–4 years, male: 5530–4 years, female: 54585+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 276 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Walnut Income

$129,449median household income

Median household income

$129,449

Half of households earn more, half earn less

Median earnings

$61,250

Typical yearly pay for a worker 25 or older.

Poverty rate

10.1%

About 1 in 10 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Walnut Marital Status

63% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married63%64%63%
Never married27%31%24%
Divorced5%3%7%
Widowed4%2%6%
Separated1%<1%1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources