East SGV · Los Angeles County · Historical edition: May 2026
Diamond Bar, California
Master-planned hillside city · Walnut Valley schools · Three-county crossroads
Explore housing, schools, and local amenities in Diamond Bar, with a historical market snapshot from May 2026 and links to its sources.
Historical snapshot from the May 2026 guide. Figures describe the periods shown; they are not current market quotes. Source websites may now show newer data. Ask Annie for a current comparison for the property you are considering.
Median Sale Price
$1.12M
March 2026 · +6.4% YoY
Source: Redfin
Zillow Home Value Index
$921K
-4.2% YoY · all housing stock
Source: Zillow ZHVI
Days on Market
~60
Somewhat competitive
Source: Redfin
Homeownership Rate
77.3%
High owner-occupancy
Source: Data USA
Schools · Historical guide
Walnut Valley Unified School District
Diamond Bar shares the Walnut Valley Unified School District with Walnut — a Niche A+ district ranked #32 statewide and in the top 5% of California. Diamond Bar High School is a national standout: ranked #56 in California and #432 nationally by U.S. News, with a Niche A+ grade. The district is the city's defining value anchor.Ratings reflect the historical guide. Confirm current programs, admission rules, and the exact address with the district; city boundaries and ratings do not establish enrollment eligibility.
Diamond Bar High School
Grades 9–12 · Public
A perfect 10/10 GreatSchools rating; ranked #56 in California and #432 nationally by U.S. News, with about 73% AP participation. One of the strongest public high schools in the region.
Source: GreatSchools · U.S. News · Niche
Walnut Valley Unified — A+ district
Grades K–12 · Public
The same A+ district that serves Walnut — #32 statewide, with proficiency roughly double the California average. Consistent excellence across the elementary and middle schools that feed Diamond Bar High.
Source: Niche · Walnut Valley USD
Magnet & honors pathways
Grades 9–12 · Public
Diamond Bar High is ranked among the top dozen magnet high schools in California by Niche, with deep honors and AP pathways — a major draw for academically focused families.
Source: Niche
Who Lives Here
Demographics & community
Population
~53,000
55,072 at 2020 Census · 2024 estimate
Median Household Income
$108,281
2024 estimate
Homeownership Rate
77.3%
High owner-occupancy
Median Age
45.7
Established multi-generational families
Sources: U.S. Census Bureau · Data USA · Census Reporter
Lifestyle Anchors
Why people buy in Diamond Bar
Three-County Crossroads
Diamond Bar sits at the 57/60 freeway junction where Los Angeles, Orange, and San Bernardino counties meet — a prime commuter location.
Walnut Valley Schools
The same A+ district as Walnut, with Diamond Bar High ranked among the top public high schools in California.
Diamond Bar Golf Course
A renovated 18-hole course originally designed by William F. Bell — a recreation anchor within the city.
Hillside Parks
Sycamore Canyon Park and Summitridge Park offer hillside hiking trails with San Gabriel Valley views.
Diamond Bar Center
A hilltop event and community venue at Summitridge — a focal point for civic life.
Master-Planned Hillside Stock
Incorporated in 1989 — rolling-hill terrain with newer single-family homes, many gated or view properties, plus a deep condo segment.
Plan your next move
Compare the property, then the price.
A citywide median does not account for a particular home’s condition, lot, layout, or transaction terms. Bring the address, your timing, and your priorities to a conversation with Annie.
Sources & Methodology
Sources for this historical guide
This guide retains the May 2026 edition. The links below identify the original providers and may now show later periods. Sale medians and modeled home-value indices measure different things and should not be combined. Use the observation period shown with each figure.
Considering Diamond Bar?
Let’s talk pricing, schools & timing
Annie can help you compare homes, discuss selling plans, and identify the property information to review. Service is available in English and Mandarin.
Annie Liu Williams · DRE# 02147335 · Vismar Corporation · DRE# 02004333 · English / 中文