Treasure Isle Neighborhood, San Mateo
Crime Rate & Statistics
Safe neighborhood — below-average crime across most categories
Safer than 50% of neighborhoods in San Mateo
Safety at a Glance
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in San Mateo
Is Treasure Isle Safe?
Yes — this neighborhood is safe. Treasure Isle in San Mateo, CA has a safety grade of A-. The overall crime index is 45, which is 55% below the national average of 100. Treasure Isle is safer than 50% of neighborhoods in San Mateo.
Compared to the San Mateo average (crime index 66), Treasure Isle is 21% lower in overall crime.
Looking at specific crime types, burglary is the most elevated concern (index: 99, 1% below average), while rape is the lowest risk (index: 22). Property crime is more prevalent than violent crime here, consistent with broader national patterns.
Treasure Isle Crime Breakdown
Crime indices compared to national average (100) and San Mateo city average. Higher values mean more crime.
| Crime Type | Index | vs National | Risk Level | |
|---|---|---|---|---|
| Violent Crime | ||||
|
Murder
|
75 | -25% | Low | |
|
Assault
|
33 | -67% | Low | |
|
Robbery
|
42 | -58% | Low | |
|
Rape
|
22 | -78% | Low | |
| Property Crime | ||||
|
Burglary
|
99 | -1% | Average | |
|
Larceny / Theft
|
84 | -16% | Average | |
|
Vehicle Theft
|
41 | -59% | Low | |
How Treasure Isle Compares
Crime index by category: Treasure Isle vs San Mateo average vs national average.
Crime by Category
Overall Crime Comparison
Treasure Isle Crime Map
Crime heatmap based on block-group level data. Red areas indicate higher crime density.
See the crime score for a specific address
Treasure Isle Demographics & Context
Education
Housing
Racial Demographics
Nearby Neighborhoods
Frequently Asked Questions
What is the crime rate in Treasure Isle, San Mateo?
Treasure Isle in San Mateo, CA has a crime safety grade of A- as of 2026. The overall crime index is 45, which is 55% below the national average. Compared to the San Mateo average, crime in Treasure Isle is 21% lower. Treasure Isle is safer than 50% of neighborhoods in San Mateo.
Is Treasure Isle a safe neighborhood in San Mateo?
Treasure Isle is generally considered a safe neighborhood in San Mateo, earning a crime grade of A-. The highest concern is Burglary (index: 99), while Rape is the lowest risk (index: 22).
How does Treasure Isle compare to the rest of San Mateo?
Treasure Isle's overall crime index is 45, compared to the San Mateo average of 66. This means crime in Treasure Isle is 21% lower than the city average. For violent crime, the index is 43, and for property crime it is 75. However, crime can vary block by block, so checking the crime map for specific streets is recommended.
What type of crime is most common in Treasure Isle?
The most prevalent crime type in Treasure Isle is Burglary, with a crime index of 99 (1% below the national average). Overall, property crime is more prevalent than violent crime in this neighborhood, which is consistent with national trends.
What are safer neighborhoods near Treasure Isle?
Nearby neighborhoods with good safety ratings include Marina Point, Bay Vista, The Islands and Carmel Village. These areas are close to Treasure Isle and offer lower crime rates, making them worth considering for residents who prioritize safety.
What are the demographics of Treasure Isle?
Treasure Isle has a population of approximately 6,354. The median household income is $151,508. The median home value is $1,637,977. Research shows that economic factors can correlate with crime rates, though many other variables play a role in neighborhood safety.
How does Treasure Isle crime compare to the national average?
Treasure Isle's overall crime rate is 55% below the national average (index 45 vs 100). Within San Mateo, it is safer than 50% of neighborhoods. For the most accurate picture, review the per-crime-type breakdown above, as some categories may differ significantly from the overall trend.
Crime data sourced from FBI UCR reports and local law enforcement agencies. Crime indices use 100 as the national average. Updated April 2026.