Half Moon Bay is a city of 12,200 in San Mateo County, about 20 miles south of downtown San Francisco · Updated November 2026
How common is violent crime in Half Moon Bay?
Half Moon Bay earns an A for violent crime, safer than the neighborhoods where 67% of Americans live. Assaults make up 88% of it, and most of those are simple assaults, which involve no weapon and no serious injury.
A
Violent crime CrimeGrade™
Safety score 912 of 1,000Less violent crime than most US neighborhoodsi What this means
67% of Americans live in neighborhoods with more violent crime than Half Moon Bay as a whole, and 33% in neighborhoods with less. The typical US neighborhood has a violent crime safety score of 860, a CrimeGrade™ of A. Half Moon Bay scores 912.
Crime is concentrated in a small share of places, so most neighborhoods score high on the 0 to 1,000 scale. That is why a score in the 800s can still mean more violent crime than most US neighborhoods.
How to read the map: each area's color compares its violent crime with the people who spend time there, on one national scale, from green for the least to red for the most. Each area gets its own color, so a busy downtown or nightlife strip can show red while the homes around it stay green. The interactive maps load faster on a solid connection. Compare high speed internet in Half Moon Bay, CA at ISP Reports.
Who this page is for: homeowners and renters in Half Moon Bay, and anyone thinking about buying or renting a home there.
Business and enterprise customers: this free map shows neighborhood areas. CrimeGrade™ business reports map crime at about 66-meter detail and estimate it for one address and type of business. See business reports
Where violent crime is lowest and highest in Half Moon Bay
Every part of Half Moon Bay where people live grades A or B for violent crime on the national scale. Violent crime grades across Half Moon Bay run from A+ to A.
100%
A or B 100%
Share of residents, by the violent crime CrimeGrade™ of the area they live in.
Is violent crime going up in Half Moon Bay?
Reported violent crime in Half Moon Bay has fallen 21% since 2019. Murders, rapes, robberies and aggravated assaults went from about 2.8 to 2.3 a year per 1,000 residents (US: 3.7). Violent crime changed little from 2023 to 2024.
Violent crime, change since 2019
Half Moon BayUnited States
Source: crime reports to the FBI from the police agencies that serve Half Moon Bay. The charts follow crimes per resident.
Data table
Year
Violent, Half Moon Bay
Violent, US
2016
-10%
+4%
2017
-6%
+4%
2018
-5%
+0%
2019
+0%
+0%
2020
+6%
+4%
2021
+12%
+6%
2022
+23%
+5%
2023
-5%
+2%
2024
-20%
-4%
Violent crime rates and types in Half Moon Bay
CrimeGrade™ estimates Half Moon Bay has about 7.7 reported violent crimes a year for every 1,000 residents, 43% less than the US as a whole and 36% less than California.
All violent crime
Assaults
Robbery
Reported crimes a year, per 1,000 residents. Violent crime here includes simple assaults, which the FBI's violent crime rate leaves out.
Assault is the most common violent crime in Half Moon Bay, about 88% of the total.
Each CrimeGrade™ here compares a violent crime with the people who spend time in an area, not only the people who live there. Rates count crimes per 1,000 residents.
Select a crime's name to see its map above. CrimeGrade™ business reports map each crime at about 66-meter detail.
Where and when violent crime happens in Half Moon Bay
The San Mateo County Sheriff's Office polices Half Moon Bay, and these figures cover every place it serves, 2022 to 2024.
In Half Moon Bay, 28% of aggravated assaults happen at a home, against 53% nationally. Robberies happen most often on streets and sidewalks: 36% of them.
Crime
Most often at
Busiest time
Robbery
Streets and sidewalks (36%)
Afternoon (noon to 6 pm)
Aggravated assault
Other places (32%)
Evening (6 pm to midnight)
Shares of the crimes reported to police, 2022 to 2024. Reports with no time recorded are left out of the times.
Violent crime in Half Moon Bay and nearby cities
Half Moon Bay has less violent crime than 6 of its 9 nearest cities.
Nearest first, with each place's distance from Half Moon Bay. Beside each violent crime CrimeGrade™ is its safety score, from 0 to 1,000 (higher is safer).
Compared with cities of similar size and density, Half Moon Bay is safer than 64% of them.
Half Moon Bay looks like a typical city on the traits that tend to go with violent crime.
Transit serviceBuses and trains an hour at the evening rush. Places with busy transit tend to report more robbery. BestNeighborhood's Transit Grade for Half Moon Bay: D- (10 of 100).NoneUS: noneLower than for 84% of US city residents
Walk GradeBestNeighborhood's grade for getting through daily life on foot, traced along real walking routes to shops, schools and parks. Walkable places tend to report more assault. 80% of residents here live in car-dependent areas.D+ (22 of 100)US: 21Higher than for 65% of US city residents
Residents in dense blocksBlocks of 10,000 or more people per square mile. Dense neighborhoods tend to report more robbery.22% of residentsUS: 24%Higher than for 60% of US city residents
Show all 4
JobsJobs draw daytime crowds. Places with many jobs tend to report more robbery.39 for every 100 residentsUS: 45Lower than for 54% of US city residents
These traits tend to go with more or less crime; none of them causes it on its own. Sources: Census job counts and housing figures, OpenStreetMap and Overture business listings, CrimeGrade™ parking estimates, NASA night-light imagery, US Forest Service tree cover, EPA transit data and BestNeighborhood's Walk Grade.
What violent crime costs Half Moon Bay
Counting the pain and suffering of victims, violent crime costs Half Moon Bay about $5.8 million a year, or $478 per resident. The costs that reach a bill, such as medical care, lost work and the justice system, come to about $1.5 million, or $125 per resident.
Billed cost of violent crime per resident, per year
How the cost breaks down
Pain and suffering are about 74% of that full cost.
Crime
Cost a year
Per resident
Murder
$160,000
$13
Rape
$330,000
$27
Robbery
$170,000
$14
Assault
$860,000
$71
Total
$1.5 million
$125
How CrimeGrade™ works
The violent crime CrimeGrade™ covers murder, rape, robbery and assault, from A+ for the least crime to F for the most, on one scale for the whole country.
It weighs each violent crime against the people who spend time in an area, so a busy downtown is graded on its workers and visitors as well as its residents.
The rates on this page count crimes for every 1,000 people who live here, the way police departments report them.
Comparisons with US neighborhoods use the Census Bureau's block groups, small areas of about 1,400 residents, and count the people who live in each. The figures count crimes reported to police; many crimes, shoplifting above all, never are. Behind the grades, CrimeGrade™ tested 21,607 factors from 125 data families. For business owners, paid CrimeGrade™ location reports estimate crime at a single address for each type of business.
Where the numbers come from
Crime reports that police departments file with the FBI
State crime records and city crime data, where they are published
Published research on what crime costs victims and communities
These are estimates of reported crime for whole areas, not a record of what happened on any one street. CrimeGrade™ updates them once a year and provides them free and without guarantee. Check local sources before you rely on them for a decision.
