Simi Valley, California population is 124,861 as of July 1, 2025 (U.S. Census Bureau Vintage 2025 estimate), ranking #237 nationally and #48 in California. Cost of living runs 11% above the U.S. average (BEA RPP 2024); a family of four needs roughly $191,217/yr to break even (2025 modeled). This profile draws on 13 federal datasets covering population, housing, income, employment, climate, and risk.
At a glance.
2025 population
124,861
-488 in the last year
Top 2% of 19,483 U.S. cities
Census Vintage 2025
Cost of living
RPP 110.5
+11% vs US
Oxnard-Thousand Oaks-Ventura, CA metro · BEA 2024
Family-of-4 budget
$191,216/yr
+139% vs US
Modeled 2025 · federal sources
Median HH income
$122,081
+57% vs US
ACS 2020–2024 5-yr
Median home value
$823,800
+172% vs US
ACS 2020–2024 5-yr
2-BR fair-market rent
$2,693/mo
HUD FY2026 · 40th pct
Avg July high
89°F
NOAA 1991–2020
Gigabit broadband
33%
ISP-reported, FCC BDC
Explore Simi Valley, CA demographics, including age, race and ethnicity, households, origins, language, and education.
How many people live in Simi Valley?
124,861 people live in Simi Valley as of July 1, 2025 (U.S. Census Bureau Population Estimates Program, Vintage 2025), the #237 largest U.S. city.
How big is Simi Valley?
Simi Valley covers 41.5 square miles of land and 0.7 square miles of water. Its population density is about 3,005 residents per square mile of land. Compare U.S. cities by land area →
Source detail: 2025 population
2025 population
Source agency
U.S. Census Bureau, Population Division
Dataset
Census PEP
Vintage / period
Vintage 2025 (Jul 1, 2025)
Native geography
Census PEP subcounty place records for the included city universe.
Transformation
Copied from POPESTIMATE2025, joined by Census GEOID, and used for ranks, filters, and city pages.
Known limit: Annual estimate, not a decennial count; each new PEP vintage can revise the prior series.
Population shrank 1.2% from the April 2020 base to mid-2025.
Vintage 2025 · annual estimates
Recent history (V2025 series, 2020 base → 2025).
2020 base: 126,375 → 2025: 124,861 (-1.2%)
Year
Population
Reference date
2020 base
126,375
April 1, 2020
2020
126,348
July 1, 2020
2021
125,834
July 1, 2021
2022
125,055
July 1, 2022
2023
125,123
July 1, 2023
2024
125,349
July 1, 2024
2025
124,861
July 1, 2025
Earlier history (2010–2019, prior Census vintage)
These figures come from the U.S. Census Bureau’s Vintage 2019 release — a separate, earlier methodology. They’re shown here as historical context only; the 2010 and 2019 values aren’t directly comparable to the 2020–2025 series above.
Population grew 0.9% from the July 2010 estimate to 2019 (V2019 — see seam note below).
Simi Valley is the #237 largest of 19,483 U.S. cities and #48 in California.
▸Show the analyst detail (9 rows)
Measure
Value
Note
2020 base
126,375
April 1, 2020 census base
5-yr change
-1,514
2020 base → 2025; within V2025
5-yr change %
-1.2%
within V2025 only
1-yr change
-488
2024 → 2025 estimate
1-yr change %
-0.4%
within V2025 only
Density
3,005
people per sq mi, land only
Land area
41.5
sq mi (2025 Gazetteer)
U.S. rank by population
#237
of 19,483 cities
State rank by population
#48
of 483 in California
What is the median household income in Simi Valley?
Median household income is 57% above the U.S. median ($122,081 vs $77,719); 6.4% live in poverty — 6.1 points below the 12.5% U.S. rate.
Median household income$122,081
US
Simi Valley: $122,081 — 57% above the US median of $77,719.
Scale: 10th–90th percentile of cities with ACS income data
Simi Valley
$122,081
United States
$77,719
Income and poverty estimates for Simi Valley from the U.S. Census Bureau's American Community Survey (ACS) 5-Year estimates (window 2020–2024). Every figure is shown with its 90% margin of error (MOE). Cells where the ± margin exceeds half the estimate are flagged "low precision." See methodology §12.
Measure
Estimate
± margin / note
Median household income
122,081+57.1% vs US
±4,649
Per capita income
55,252+27.6% vs US
±1,763
Population in poverty
6.4%
share of population for whom poverty status is determined
Median home value is 172% above the U.S. median ($823,800 vs $303,400); median rent is 91% above ($2,579 vs $1,348); price-to-income ratio is 6.7×, making it 1.7× as cost-burdened as the typical U.S. city (3.9×).
Median home value$823,800
US
Simi Valley: $823,800 — 172% above the US median of $303,400.
Scale: 10th–90th percentile of cities with ACS home-value data
HUD 2-BR fair-market rent$2,693/mo
US
Simi Valley: $2,693/mo — 150% above the US median of $1,077/mo.
Scale: 10th–90th percentile of cities with a HUD Fair Market Rent
Poverty (Census SAIPE 2024, model-based), unemployment (BLS LAUS 2024 annual averages), and remote-work share (ACS 2020–2024) for Simi Valley. Numbers are labeled at their native grain — place-grain when BLS publishes it, otherwise per-county. We do not compute population-weighted county averages. See methodology §13.
Measure
Value
Grain
Unemployment rate (annual avg)
4.1%
Simi Valley (BLS sub-state LAUS)
Civilian labor force
67,813
2024 annual avg
Worked from home
19.1%+36.7% vs US
share of workers 16+ commuting from home · U.S. median: 14% · ACS
County context — Simi Valley sits in Ventura County:
County
Poverty rate
Median HH income
Unemployment
Ventura County
9.5%
$112,872
4.6%
Top industries by private employment — NAICS supersectors rolled up from Simi Valley's linked county in the U.S. Bureau of Labor Statistics' Quarterly Census of Employment and Wages (QCEW, 2024 annual averages). See methodology §11.
#
Industry (NAICS supersector)
Private employment
Avg weekly wage
#1
Health care and social assistance (62)
49,739
$1,112 / wk
#2
Retail trade (44-45)
35,647
$876 / wk
#3
Accommodation and food services (72)
33,250
$610 / wk
#4
Manufacturing (31-33)
27,385
$1,605 / wk
#5
Agriculture, forestry, fishing and hunting (11)
24,597
$825 / wk
What workers earn in the Oxnard-Thousand Oaks-Ventura, CA metro — top occupations by employment plus six curated benchmarks (registered nurse, software developer, elementary teacher, general manager, retail salesperson, truck driver). Wages are metro-area medians from the U.S. Bureau of Labor Statistics' Occupational Employment and Wage Statistics (May 2025). See methodology §25.
Home Health and Personal Care Aides is the largest tracked occupation in the Oxnard-Thousand Oaks-Ventura, CA metro (15,250 jobs, median $34,320/yr).
▸Show all 13 occupations
Occupation
Employment
Median annual
Median hourly
Home Health and Personal Care Aides
15,250
$34,320
$16.50
Fast Food and Counter Workers
9,520
$42,370
$20.37
Cashiers
7,620
$36,150
$17.38
Office Clerks, General
5,750
$48,370
$23.25
Laborers and Freight, Stock, and Material Movers, Hand
5,600
$41,920
$20.16
Stockers and Order Fillers
4,640
$37,350
$17.96
Waiters and Waitresses
4,530
$34,910
$16.79
Retail Salespersons · benchmark
8,270
$36,880
$17.73
General and Operations Managers · benchmark
5,770
$103,870
$49.94
Registered Nurses · benchmark
5,710
$131,160
$63.06
Elementary School Teachers, Except Special Education · benchmark
3,060
$99,420
—
Heavy and Tractor-Trailer Truck Drivers · benchmark
All items run 10.5% above the U.S. average (RPP 110.5); rents run 71.1% above (RPP 171.1) — the metro's housing premium is the main driver.
Cost of living (RPP, all items)RPP 110.5
US
Simi Valley's cost of living runs 10.5% above the U.S. average (RPP 110.5 vs 100).
Scale: 10th–90th percentile of metro/non-metro areas with a BEA price parity
BEA Regional Price Parity (all items)
RPP 110.5
+10.5% vs U.S. average · BEA 2024 · Oxnard-Thousand Oaks-Ventura, CA metro
HUD Fair Market Rent, 2-BR
$2,693/mo
FY2026 · Oxnard-Thousand Oaks-Ventura, CA MSA
State income tax (top marginal rate)
12.30%
9 brackets · TY2025
Family-of-four monthly budget total
$15,935/mo
3BR rent + food + childcare + taxes + transport · federal sources
Single-adult monthly budget total
$7,120/mo
1BR rent + food + taxes + transport · federal sources
Local income tax
—
not applicable in California · no modeled local income tax
Household budget figures are arithmetic floors using current federal sources at the grains documented in methodology. Not a recommended salary, not a poverty threshold, not a composite score.
18.5% foreign-born (U.S. median 14%); Spanish is the most-spoken language at home other than English (16.2% of residents 5+).
A quick read on Simi Valley's residents — nativity and languages spoken at home shown above, from the ACS 5-Year 2020–2024. The full demographic breakdown (age, race and ethnicity, household types, and educational attainment, each with its margin of error) lives on the demographics page.
Hottest month: August (91°F avg high). Coldest: December (42°F avg low). Annual precipitation: 16.5 in.
30-year climate normals (1991-2020) for Simi Valley from the U.S. National Oceanic and Atmospheric Administration. See methodology §15 for the gridded vs. station source path.
Average monthly highs & lows · 30-year normal (NOAA 1991–2020). Every number on this chart is an average.
bar = avg daily high → avg daily lowprecip in inches below each barprecip in millimeters below each bar
Composite risk score: 99.4/100 — Relatively High nationally; top hazard: Wildfire (99.8).
Natural-hazard exposure for Simi Valley from the U.S. Federal Emergency Management Agency's National Risk Index (FEMA NRI December 2025 v1.20.0). NRI is an expected-annual-loss composite calibrated on 1996–2019 historical losses, published at the U.S. county grain. See methodology §17.
County
NRI composite
Rating
Top hazards
Ventura County
99.4
Relatively High
Wildfire 99.8 Relatively High · Earthquake 99.7 Relatively High · Riverine Flooding 99.3 Very High
Source: FEMA National Risk Index · FEMA NRI December 2025 v1.20.0 · methodology →
How fast is home internet in Simi Valley?
10 non-satellite ISPs serve the area; 33% of locations have gigabit-capable service per ISP filings.
Fixed broadband availability for Simi Valley from the U.S. Federal Communications Commission's Broadband Data Collection (BDC), as of June 30, 2025. Every speed and provider count below is an ISP-reported advertised maximum — not measured throughput. Actual delivered speeds typically run 60–80% of advertised. See methodology §16.
Measure
Value
Note
Providers serving this city
10 + satellite
distinct ISPs, excluding satellite-only
Fiber providers
7
offer fiber-to-the-premises somewhere in the BDC
Units with ≥100/20 Mbps fixed
100.0%
share of broadband-serviceable units, ISP-reported max
Locations with ≥100 Mbps upload
33.1%
derived: max(fiber ≥100/20, gigabit). Fiber is symmetric; gigabit is ≥100 up by definition
Units with ≥1 Gbps fixed
33.1%
share of broadband-serviceable units, ISP-reported max
Total broadband-serviceable units
49,462
residential locations in the FCC Fabric (not households)
Source: FCC BDC · as of June 30, 2025 · methodology →
In-state context.
Simi Valley sits at state rank #48 among 483 cities in California. Nearby in the state ranking:
Just above in the profiled set: Broken Arrow, OK · #236 · 124,991 residents.
Just below in the profiled set: Rochester, MN · #238 · 124,292 residents.
Quick travel facts for Simi Valley
Quick travel facts.
Nearest commercial airport
Hollywood Burbank/Bob Hope Airport(BUR) · 23 mi 37 km from city centroid
Best months to visit
May · months when the avg high sits in 65–80°F and precipitation is at or below the city's median monthly precip
Sources: elevation from USGS Elevation Point Query Service (3DEP) · nearest airport from OurAirports CSV (FAA-aligned, type=large/medium, scheduled_service=yes) · best months derived from NOAA 1991-2020 normals · methodology →
Frequently asked questions about Simi Valley.
How many people live in Simi Valley, CA?
Simi Valley has 124,861 residents as of July 1, 2025, making it the #237 largest city in the United States and #48 in California. Source: U.S. Census Bureau Population Estimates Program, Vintage 2025.
Is Simi Valley growing or shrinking?
Simi Valley has shrunk 1.2% since the April 2020 census baseline, losing 1,514 residents, including a 0.4% decline from 2024 to 2025. Source: Census PEP Vintage 2025.
What was Simi Valley's population in the 2020 census?
The GEOID for Simi Valley is 0672016. These are the official datasets used by this profile's main data modules; click "methodology" for inclusion rules and the V2019 ↔ V2025 seam, or "source" for the raw publisher page. The headline population value above includes a source-detail disclosure with publisher, dataset, vintage, native geography, transformation, and caveat.
