Best PlacesDiamond Bar, CA Best Neighborhoods
2026–2027 edition · Data updated July 2026
Every neighborhood in and around Diamond Bar, scored on 40 measures of daily life and ranked to fit what matters to you. The coast is close, and the measures below put a number on how close. To work out which city fits you best, start with the best places to live tool.
Diamond Bar ranks 1,153rd of 2,098 U.S. cities on the BestNeighborhood index. It scores highest on population health by a wide margin, and air quality ranks lowest.
The best neighborhoods in Diamond Bar
BestNeighborhood is the only ranking that scores 40 measures of daily life neighborhood by neighborhood and lets you re-weight every one of them yourself.
Diamond Bar's strengths and weaknesses
Where Diamond Bar ranks high
- Health outlookBetter than 96% of cities
- Nice weatherabout 255 pleasant days a year, better than 96% of cities
- Big-city accessBetter than 94% of cities
- Educational attainmentBetter than 75% of cities
- TransitBetter than 73% of cities
Where Diamond Bar ranks low
- Air qualityBetter than only 2% of cities
- QuietBetter than only 7% of cities
- Short commute33.2 minutes each way, better than only 10% of cities
- Low income/sales/gas taxBetter than only 14% of cities
- Disaster safetyBetter than only 15% of cities
What it costs to buy a home in Diamond Bar
A household needs to earn about $242,000 a year to comfortably buy the median Diamond Bar home, at 20% down and today's 30-year rate. That runs well above the area's median income of $110,025, so buying stretches a typical household.
Where the monthly payment goes
Assumes a 20% down payment, a 6.6% 30-year fixed rate, and a 28% share of income going to the payment. The rate is the 2026-07-23 30-year fixed average, series MORTGAGE30US from the St. Louis Fed, which publishes Freddie Mac's weekly survey. Against the median home value, property tax uses Diamond Bar's effective rate of 0.77%, and insurance is estimated at 0.4% of home value a year.
Renting versus buying
At today's prices and rents, renting stays cheaper than buying across the first 10 years here, so the case for buying rests on staying much longer or on prices rising faster than assumed. The chart tracks the running cost of each.
Who lives in Diamond Bar
Diamond Bar runs older than the country, and households here run larger than average.
Residents by age
Racial and ethnic makeup has its own map. See the race and diversity map for Diamond Bar.
Who works in Diamond Bar, and how
Work in Diamond Bar centers on health care & social and professional & technical. Unemployment is low, and jobs are growing.
Largest industries
How people get to work
- Drive or carpool 78%
- Work from home 19%
- Transit, walk, or bike 3%
Life in Diamond Bar
Diamond Bar has more restaurants and bars per resident than 66% of cities and more parkland per resident than 80% of cities. The coast is about 27 minutes away. Dining, parks, and nightlife concentrates in some parts of Diamond Bar and thins out in others, which the map shows.
What the weather is like in Diamond Bar, month by month
Diamond Bar sees roughly 255 pleasant days a year. July highs average about 90 degrees. January highs sit near 64, with lows near 45. The comfortable stretch runs October through June.
Show the monthly temperatures
| Month | Avg high | Avg | Avg low |
|---|---|---|---|
| January | 64° | 56° | 45° |
| April | 73° | 65° | 52° |
| July | 90° | 80° | 65° |
| October | 81° | 72° | 58° |
Flying in and out of Diamond Bar
Ontario International sits about 13 miles away. It is a medium hub and boarded 3.5 million passengers in 2025, with 62 nonstop destinations.
The best schools in and around Diamond Bar
Schools across Diamond Bar average a B, better than 64% of cities.
Top high schools
- Diamond Bar HighA · 78% proficient
- Walnut HighA · 67% proficient
- John A. Rowland HighA− · 59% proficient
Grades come from K-12 test scores, with scores projected for schools missing data. See every Diamond Bar school and its grade on SchoolGrade.
Diamond Bar measure by measure
Cards are ordered by how much each measure matters to you, so the ones you weighted highest come first. Expand to see every measure. Percentages compare Diamond Bar against the other 2,097 cities.
Who Diamond Bar suits
Remote workers
Internet is fast and widely advertised and 19% already work from home.
Common questions about living in Diamond Bar
Is Diamond Bar a good place to live?
Using BestNeighborhood's default rankings, Diamond Bar ranks 1,153rd of 2,098 cities. It scores highest on population health, the weather, and big-city access, and lowest on air quality and noise. How good it is for you depends on which of those you weight most, which the map lets you set.
Is Diamond Bar expensive to live in?
The median home is worth $928,169. The overall cost of living runs about 38% above the national average. Set against a $110,025 median income, cost of living beats 26% of cities.
Is Diamond Bar safe?
Diamond Bar is safer than 48% of cities. Safety varies a lot by neighborhood. Crime costs an estimated $332 per resident a year.
What is the weather like in Diamond Bar?
July highs average about 90 degrees, and January highs near 64 with lows near 45. That works out to about 255 pleasant days a year, more than 96% of cities.
Is Diamond Bar good for families?
Schools beat 64% of cities, crime safety beats 48%, and childcare runs $1,130 a month.
Compare Diamond Bar with other cities
Sources and methodology
Every measure on this page is scored for each neighborhood, then rolled up to Diamond Bar. Scores are absolute rather than ranked, which means a 60 in Diamond Bar represents the same real quantity as a 60 anywhere else, and the ranking is a weighted average of those absolutes. The map colors come from a national scale calibrated against a population weighted random sample of 5,000 neighborhoods. That absolute scoring is what no other places-to-live ranking does: it puts a single neighborhood, a town, a metro, and a state on one scale, so the same 40 measures answer both which metro to move to and which street inside it to buy on. Read the full methodology.
Diamond Bar detail on BestNeighborhood maps:
- Walk Grade for Diamond Bar: walkability, transit, and biking, measured on the real street network rather than by straight line distance.
- Noise in Diamond Bar: road, rail, and aviation sound modeling calibrated against federal ground truth measurements.
- Conservative vs liberal map of Diamond Bar: precinct level election results apportioned to neighborhoods.
- Mobile and cell coverage in Diamond Bar: carrier by carrier coverage behind the cell score.
Diamond Bar detail on related sites:
- CrimeGrade: neighborhood crime rates behind the crime safety score.
- ISPreports.org: provider by provider internet availability and advertised speeds.
- CoverageWatch: the car insurance premiums behind the cheap car insurance score.
Federal and public data:
- U.S. Census Bureau American Community Survey: income, home value, rent, vacancy, commute time and mode, educational attainment, home age, age structure, household type, industry, and race.
- NOAA Global Surface Summary of the Day: the daily station record behind the monthly temperatures and the pleasant-day count.
- FAA Passenger Boarding Data: airport size and annual passenger counts.
- Freddie Mac Primary Mortgage Market Survey: the 30-year fixed rate used in the cost-to-buy estimate.
- FBI Crime Data Explorer: reported offenses behind the tangible crime cost estimate.
- U.S. EPA Air Quality System: five year average air quality index.
- FEMA National Risk Index: expected annual loss from natural hazards.
- CDC PLACES: disease burden, preventable risk, and barriers to care.
- National Center for Education Statistics: school enrollment and assessment inputs behind the school grade.
- FCC National Broadband Map: internet and wireless availability.
- U.S. Bureau of Labor Statistics: employment and job growth behind the local economy score.
- Religious activity uses a proprietary religious signal measurement.
Your priorities
Move a slider to say how much a measure matters. Zero turns it off.