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find Halloween events for every vibe.

Events in Diamond Bar, CA

Search for something you love or check out popular events in your area.

Nearly full
IXL Live: Administrator Edition - Ontario, CA (Oct. 22)
Wed, Oct 22, 10:00 AM
North Ontario · Delta Hotels by Marriott Ontario
Nearly full
IXL Live: Administrator Edition - Ontario, CA (Oct. 22)
Wed, Oct 22, 10:00 AM
North Ontario · Delta Hotels by Marriott Ontario
Together for Erin: A Ladies Luncheon Fundraiser Filled with Love and Hope
Sat, Nov 1, 1:00 PM
Friendly Hills · 9415 Mesa Robles Dr
Together for Erin: A Ladies Luncheon Fundraiser Filled with Love and Hope
Sat, Nov 1, 1:00 PM
Friendly Hills · 9415 Mesa Robles Dr
250th USMC Birthday Festival
Mon, Nov 10, 3:00 PM
Archiblad Ranch · Side Action Apparel Headquarters
250th USMC Birthday Festival
Mon, Nov 10, 3:00 PM
Archiblad Ranch · Side Action Apparel Headquarters
Abdul Hannan Meet & Greet – Chai Society Block Party
Sun, Oct 19, 5:00 PM
South Anaheim · 2Create Designs
Abdul Hannan Meet & Greet – Chai Society Block Party
Sun, Oct 19, 5:00 PM
South Anaheim · 2Create Designs
Sales end soon
OC Business Expo Exhibitor Portal - Grow Your Brand + Connect with Buyers
Tuesday at 4:00 PM
Artisan Walk · California State University, Fullerton
Sales end soon
OC Business Expo Exhibitor Portal - Grow Your Brand + Connect with Buyers
Tuesday at 4:00 PM
Artisan Walk · California State University, Fullerton
Spooky Dance Time
Sun, Oct 19, 7:00 PM
SoCo · Mi Vida Loca Bar and Lounge
Spooky Dance Time
Sun, Oct 19, 7:00 PM
SoCo · Mi Vida Loca Bar and Lounge
CANDIPOP 2000s PARTY @ HEAT ULTRA LOUNGE OC 21+
Today at 9:00 PM
Hotel Circle · HEAT Ultra Lounge
CANDIPOP 2000s PARTY @ HEAT ULTRA LOUNGE OC 21+
Today at 9:00 PM
Hotel Circle · HEAT Ultra Lounge
Fall Wellness & Market
Sat, Oct 25, 10:00 AM
Boys Republic · 4300 Heather Cir
Fall Wellness & Market
Sat, Oct 25, 10:00 AM
Boys Republic · 4300 Heather Cir
REGGAETON & HIP-HOP PARTY @ HEAT ULTRA LOUNGE OC 21+
Today at 9:00 PM
Hotel Circle · HEAT Ultra Lounge
REGGAETON & HIP-HOP PARTY @ HEAT ULTRA LOUNGE OC 21+
Today at 9:00 PM
Hotel Circle · HEAT Ultra Lounge
La Ultima Y Nos Vamos con Los Cadetes De Linares, Los Dinamicos Del Norte
Sat, Nov 15, 5:30 PM
Gateway Center · Santa Fe Springs Swap Meet
La Ultima Y Nos Vamos con Los Cadetes De Linares, Los Dinamicos Del Norte
Sat, Nov 15, 5:30 PM
Gateway Center · Santa Fe Springs Swap Meet
HALLOWEEN RANCHO FEST
Sat, Oct 25, 10:00 AM
West Whittier · Pico Rivera Sports Arena
HALLOWEEN RANCHO FEST
Sat, Oct 25, 10:00 AM
West Whittier · Pico Rivera Sports Arena
Hocus Pocus Halloween Party
Thu, Oct 23, 6:00 PM
Claremont · Padua Hills Theatre
Hocus Pocus Halloween Party
Thu, Oct 23, 6:00 PM
Claremont · Padua Hills Theatre
Townhall Conservative Forum 2025
Sun, Oct 19, 11:00 AM
Hotel Circle · Hyatt Regency Orange County
Townhall Conservative Forum 2025
Sun, Oct 19, 11:00 AM
Hotel Circle · Hyatt Regency Orange County
Los Jefes Del Rock con Interpuesto, Alma Callejera, Tex Tex, y Sam Sam
Sat, Nov 1, 5:30 PM
Gateway Center · Santa Fe Springs Swap Meet
Los Jefes Del Rock con Interpuesto, Alma Callejera, Tex Tex, y Sam Sam
Sat, Nov 1, 5:30 PM
Gateway Center · Santa Fe Springs Swap Meet
2000s NIGHT @ HEAT ULTRA LOUNGE OC
Today at 9:30 PM
Hotel Circle · HEAT Ultra Lounge
2000s NIGHT @ HEAT ULTRA LOUNGE OC
Today at 9:30 PM
Hotel Circle · HEAT Ultra Lounge
In Conversation With: Daniel Villarreal
Sat, Oct 18, 6:00 PM
Des Moines · The Phantom Projects Theatre at La Habra Depot
In Conversation With: Daniel Villarreal
Sat, Oct 18, 6:00 PM
Des Moines · The Phantom Projects Theatre at La Habra Depot
RB Youth Conference
West Holt · RAV Pomona
RB Youth Conference
West Holt · RAV Pomona
Selling quickly
Paint n Sip BUZZWORTHY BEVERAGE CLAREMONT
Sat, Oct 18, 12:30 PM
North Pomona · Buzzworthy Beverages - Non-alcoholic & Functional Bottle Shop
Selling quickly
Paint n Sip BUZZWORTHY BEVERAGE CLAREMONT
Sat, Oct 18, 12:30 PM
North Pomona · Buzzworthy Beverages - Non-alcoholic & Functional Bottle Shop
Sales end soon
Michael Myers Sip & Paint
Tuesday at 7:00 PM
Downtown Fullerton · ZAMA Latin Lounge + Kitchen
Sales end soon
Michael Myers Sip & Paint
Tuesday at 7:00 PM
Downtown Fullerton · ZAMA Latin Lounge + Kitchen
Just added!
Palapas Fall'25
Fri, Oct 24, 8:00 PM
Rancho la Paz · 1105 E Walnut Ave
Just added!
Palapas Fall'25
Fri, Oct 24, 8:00 PM
Rancho la Paz · 1105 E Walnut Ave

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:

IXL Live: Administrator Edition - Ontario, CA (Oct. 22)

Together for Erin: A Ladies Luncheon Fundraiser Filled with Love and Hope

250th USMC Birthday Festival

Abdul Hannan Meet & Greet – Chai Society Block Party

Which events are currently trending in Diamond Bar?

The trending searches this month in Diamond Bar are:

events happening today near me

free kids event

Which events are coming up?

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

CANDIPOP 2000s PARTY @ HEAT ULTRA LOUNGE OC 21+

REGGAETON & HIP-HOP PARTY @ HEAT ULTRA LOUNGE OC 21+

2000s NIGHT @ HEAT ULTRA LOUNGE OC

OC Business Expo Exhibitor Portal - Grow Your Brand + Connect with Buyers