Best Places91739, CA Best Neighborhoods
2026–2027 edition · Data updated July 2026
Every neighborhood inside ZIP code 91739, scored on 40 measures of daily life and ranked to fit what matters to you. Local pay runs high here, and housing takes the biggest bite out of it. To work out which city fits you best, start with the best places to live tool.
91739 ranks 6,890th of 33,110 U.S. zip codes on the BestNeighborhood index. It scores highest on the weather by a wide margin, and air quality ranks lowest.
The best neighborhoods in 91739
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.
91739's strengths and weaknesses
Where 91739 ranks high
- Nice weatherabout 201 pleasant days a year, better than 97% of zip codes
- Health outlookBetter than 96% of zip codes
- Big-city accessBetter than 96% of zip codes
- Household income$146,033 median, better than 95% of zip codes
- Cell coverageBetter than 90% of zip codes
Where 91739 ranks low
- Air qualityBetter than only 1% of zip codes
- QuietBetter than only 8% of zip codes
- Housing crash safetyBetter than only 8% of zip codes
- Disaster safetyBetter than only 10% of zip codes
- Low income/sales/gas taxBetter than only 10% of zip codes
What it costs to buy a home in 91739
A household needs to earn about $234,000 a year to comfortably buy the median 91739 home, at 20% down and today's 30-year rate. That runs well above the area's median income of $146,033, 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 91739's effective rate of 0.81%, 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 91739
91739 runs younger 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 91739.
Who works in 91739, and how
Work in 91739 centers on health care & social and education. Unemployment is close to the national rate, and jobs are growing.
Largest industries
How people get to work
- Drive or carpool 79%
- Work from home 17%
- Transit, walk, or bike 3%
Life in 91739
91739 has more restaurants and bars per resident than 65% of zip codes. The coast is about 45 minutes away. That concentrates in some parts of 91739 and thins out in others, which the map shows.
What the weather is like in 91739, month by month
91739 sees roughly 201 pleasant days a year. July highs average about 96 degrees. January highs sit near 69, with lows near 43. The comfortable stretch runs October through June.
Show the monthly temperatures
| Month | Avg high | Avg | Avg low |
|---|---|---|---|
| January | 69° | 55° | 43° |
| April | 79° | 63° | 51° |
| July | 96° | 79° | 65° |
| October | 87° | 70° | 57° |
Flying in and out of 91739
Ontario International sits about 7 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 91739
Schools across 91739 average a B−, better than 60% of zip codes.
Top middle schools
- Ethel Kucera MiddleD+ · 25% proficient
Top high schools
- Summit HighA · 75% proficient
- Los Osos HighA− · 61% proficient
- Rancho Cucamonga HighB+ · 53% proficient
Grades come from K-12 test scores, with scores projected for schools missing data. See every 91739 school and its grade on SchoolGrade.
91739 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 91739 against the other 33,109 zip codes.
Who 91739 suits
Remote workers
Cost of living against local pay beats 86% of zip codes, internet is fast and widely advertised, and 17% already work from home.
Common questions about living in 91739
Is 91739 a good place to live?
Using BestNeighborhood's default rankings, 91739 ranks 6,890th of 33,110 zip codes. It scores highest on the weather, population health, 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 91739 expensive to live in?
The median home is worth $892,780. The overall cost of living runs about 25% above the national average. Set against a $146,033 median income, cost of living beats 86% of zip codes.
Is 91739 safe?
Yes, 91739 is safer than 60% of zip codes. Safety varies a lot by neighborhood. Crime costs an estimated $345 per resident a year.
What is the weather like in 91739?
July highs average about 96 degrees, and January highs near 69 with lows near 43. That works out to about 201 pleasant days a year, more than 97% of zip codes.
Is 91739 good for families?
Schools beat 60% of zip codes, crime safety beats 60%, and childcare runs $1,252 a month.
Compare 91739 with other zip codes
Sources and methodology
Every measure on this page is scored for each neighborhood, then rolled up to 91739. Scores are absolute rather than ranked, which means a 60 in 91739 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.
91739 detail on BestNeighborhood maps:
- Walk Grade for 91739: walkability, transit, and biking, measured on the real street network rather than by straight line distance.
- Noise in 91739: road, rail, and aviation sound modeling calibrated against federal ground truth measurements.
- Conservative vs liberal map of 91739: precinct level election results apportioned to neighborhoods.
- Mobile and cell coverage in 91739: carrier by carrier coverage behind the cell score.
91739 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.