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Community Events and Things to do in Diamond Bar, CA

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2026 Filipino Weekend at Disneyland Resort Reception
Fri, Apr 17, 6:00 PM
Fullerton · Fullerton Community Center
2026 Filipino Weekend at Disneyland Resort Reception
Fri, Apr 17, 6:00 PM
Fullerton · Fullerton Community Center
Cooper Museum Speaker Series: Charles Jenkins
Today at 6:30 PM
Upland · 217 E A St
Cooper Museum Speaker Series: Charles Jenkins
Today at 6:30 PM
Upland · 217 E A St
Taste of Claremont 2026
Sat, Apr 18, 5:00 PM
Claremont · The Claremont Colleges Services
Taste of Claremont 2026
Sat, Apr 18, 5:00 PM
Claremont · The Claremont Colleges Services
Viet Book Fest 2026
Sun, Apr 12, 10:00 AM
Santa Ana · Bowers Museum
Viet Book Fest 2026
Sun, Apr 12, 10:00 AM
Santa Ana · Bowers Museum
Going fast
Speed Dating | Ages 21-27 | Brewheim | Anaheim, CA
Tomorrow at 6:30 PM
Anaheim · Brewheim
Going fast
Speed Dating | Ages 21-27 | Brewheim | Anaheim, CA
Tomorrow at 6:30 PM
Anaheim · Brewheim
Sales end soon
2026 Wistaria Festival Shuttle Tickets
Saturday at 9:00 AM
Sierra Madre · 2026 Wistaria Festival
Sales end soon
2026 Wistaria Festival Shuttle Tickets
Saturday at 9:00 AM
Sierra Madre · 2026 Wistaria Festival
Sales end soon
OC Habitats Coffee & Conservation Talks
Saturday at 9:00 AM
Santa Ana · 1505 17th St suit 201
Sales end soon
OC Habitats Coffee & Conservation Talks
Saturday at 9:00 AM
Santa Ana · 1505 17th St suit 201
Cooper Museum Speaker Series: Chaffey Legacy in Australia
Thu, May 21, 6:30 PM
Upland · 217 E A St
Cooper Museum Speaker Series: Chaffey Legacy in Australia
Thu, May 21, 6:30 PM
Upland · 217 E A St
Sales end soon
Gothic Tea Party hosted by Inland Empire Goth
Saturday at 1:00 PM
Claremont · Claremont Center For Spiritual Living
Sales end soon
Gothic Tea Party hosted by Inland Empire Goth
Saturday at 1:00 PM
Claremont · Claremont Center For Spiritual Living
Motorized Animal Weekend - APRIL 25TH
Sat, Apr 25, 11:00 AM
Commerce · The Compound by Dirt Dog
Motorized Animal Weekend - APRIL 25TH
Sat, Apr 25, 11:00 AM
Commerce · The Compound by Dirt Dog
Cooper Museum Speaker Series: Cucamonga Valley Wine Growing
Thu, Apr 23, 6:30 PM
Upland · 217 E A St
Cooper Museum Speaker Series: Cucamonga Valley Wine Growing
Thu, Apr 23, 6:30 PM
Upland · 217 E A St
CalSAC Comedy Night - Funn AF: Learning, Laughter, Leadership
Thu, Apr 23, 7:00 PM
Rosemead · DoubleTree by Hilton Hotel Los Angeles - Rosemead
CalSAC Comedy Night - Funn AF: Learning, Laughter, Leadership
Thu, Apr 23, 7:00 PM
Rosemead · DoubleTree by Hilton Hotel Los Angeles - Rosemead
Going fast
Affordable Housing Clearinghouse's 35th Anniversary Gala
Wed, Apr 1, 6:30 PM
Santa Ana · The Hacienda
Going fast
Affordable Housing Clearinghouse's 35th Anniversary Gala
Wed, Apr 1, 6:30 PM
Santa Ana · The Hacienda
Sales end soon
Plei Game Night - SANTA ANA
Tomorrow at 8:00 PM
Santa Ana · Beale's Texas BBQ
Sales end soon
Plei Game Night - SANTA ANA
Tomorrow at 8:00 PM
Santa Ana · Beale's Texas BBQ
Table 4 Tonight: Rosemead | Dinner with Strangers small town
Tue, Jun 9, 7:00 PM + 8 more
Rosemead · Restaurant of the Week
Table 4 Tonight: Rosemead | Dinner with Strangers small town
Tue, Jun 9, 7:00 PM + 8 more
Rosemead · Restaurant of the Week
Cooper Museum Speaker Series: Historic Home Styles
Thu, Jun 25, 6:30 PM
Upland · 217 E A St
Cooper Museum Speaker Series: Historic Home Styles
Thu, Jun 25, 6:30 PM
Upland · 217 E A St
Cooper Museum Speaker Series: Water: Past, Present, & Future
Thu, Jul 23, 6:30 PM
Upland · 217 E A St
Cooper Museum Speaker Series: Water: Past, Present, & Future
Thu, Jul 23, 6:30 PM
Upland · 217 E A St
2026 Picnic in the Park
Fri, Jun 19, 5:00 PM + 2 more
Eastvale · Eastvale Community Park
2026 Picnic in the Park
Fri, Jun 19, 5:00 PM + 2 more
Eastvale · Eastvale Community Park
Relámpago del Cielo 50th Anniversary Gala Dinner and Dance
Sat, May 2, 6:00 PM
Santa Ana · Santa Ana Elks Lodge #794
Relámpago del Cielo 50th Anniversary Gala Dinner and Dance
Sat, May 2, 6:00 PM
Santa Ana · Santa Ana Elks Lodge #794
Cooper Museum Speaker Series: The Human Connection of Sister Cities
Thu, Sep 24, 6:30 PM
Upland · 217 E A St
Cooper Museum Speaker Series: The Human Connection of Sister Cities
Thu, Sep 24, 6:30 PM
Upland · 217 E A St

Trends in Diamond Bar

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Frequently asked questions about Diamond Bar

What are the best events to attend?

According to Eventbrite, the best events are:

2026 Filipino Weekend at Disneyland Resort Reception

Taste of Claremont 2026

Viet Book Fest 2026

OC Habitats Coffee & Conservation Talks

Which events are currently trending in Diamond Bar?

The trending searches this month in Diamond Bar are:

easter egg hunt free

living trust and estate planning seminar

events happening today near me

Which events are coming up?

Discover the best events happening soon – you don't want to miss them:

Cooper Museum Speaker Series: Charles Jenkins

Speed Dating | Ages 21-27 | Brewheim | Anaheim, CA

Plei Game Night - SANTA ANA

2026 Wistaria Festival Shuttle Tickets