October 31st Events and Things to do in Costa Mesa, CA

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OC Fairgrounds Halloween Costume Party, October 31st
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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OC Fairgrounds Halloween Costume Party, October 31st
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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OC FairGrounds Halloween Night, October 31st $10 w/rsvp before 10:30pm
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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OC FairGrounds Halloween Night, October 31st $10 w/rsvp before 10:30pm
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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PROJECT NIGHTMARE @ OC FAIR & EVENT CENTER | OCTOBER 31ST
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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PROJECT NIGHTMARE @ OC FAIR & EVENT CENTER | OCTOBER 31ST
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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Haunted HEAT Halloween
Saturday at 9:30 PM
Anaheim · HEAT Ultra Lounge
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Haunted HEAT Halloween
Saturday at 9:30 PM
Anaheim · HEAT Ultra Lounge
Sales end soon
PROJECT NIGHTMARE @ OC FAIRGROUNDS SATURDAY OCT 31ST | HALLOWEEN
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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PROJECT NIGHTMARE @ OC FAIRGROUNDS SATURDAY OCT 31ST | HALLOWEEN
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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October 31st - 11:00am - Simply Scary Sugar Cookie Decorating Class!
Saturday at 11:00 AM
Anaheim · Zion Lutheran Church
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October 31st - 11:00am - Simply Scary Sugar Cookie Decorating Class!
Saturday at 11:00 AM
Anaheim · Zion Lutheran Church
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Halloween Night @ OC Fairgrounds $10 w/rsvp before 10:30pm
Saturday at 10:00 PM
Costa Mesa · OC Fairground Costa Mesa Building
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Halloween Night @ OC Fairgrounds $10 w/rsvp before 10:30pm
Saturday at 10:00 PM
Costa Mesa · OC Fairground Costa Mesa Building
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PROJECT NIGHTMARE @ OC FAIRGROUNDS | 10/31ST | $10 W/RSVP BEFORE 10:30PM
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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PROJECT NIGHTMARE @ OC FAIRGROUNDS | 10/31ST | $10 W/RSVP BEFORE 10:30PM
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
Sales end soon
Peaches & Punches : Halloween Edition
Saturday at 9:00 AM
Irvine · Orange County Production Studios
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Peaches & Punches : Halloween Edition
Saturday at 9:00 AM
Irvine · Orange County Production Studios
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TRICK or TREAT HALLOWEEN NIGHT
Saturday at 10:00 PM
Anaheim · 1233 S Brookhurst St
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TRICK or TREAT HALLOWEEN NIGHT
Saturday at 10:00 PM
Anaheim · 1233 S Brookhurst St
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HALLOWEEN NIGHT @ OC FAIRGROUNDS $10 W/RSVP BEFORE 10:30PM | 18+
Saturday at 10:00 PM
Costa Mesa · OC Fairground Costa Mesa Building
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HALLOWEEN NIGHT @ OC FAIRGROUNDS $10 W/RSVP BEFORE 10:30PM | 18+
Saturday at 10:00 PM
Costa Mesa · OC Fairground Costa Mesa Building
Sales end soon
PROJECT NIGHTMARE | OCT 31ST | HALLOWEEN NIGHT @ OC FAIR & EVENT CENTER
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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PROJECT NIGHTMARE | OCT 31ST | HALLOWEEN NIGHT @ OC FAIR & EVENT CENTER
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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Palenque Costa Mesa: Halloween Costume Party
Saturday at 9:00 PM
Costa Mesa · Palenque Kitchen Costa Mesa
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Palenque Costa Mesa: Halloween Costume Party
Saturday at 9:00 PM
Costa Mesa · Palenque Kitchen Costa Mesa
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Newport Beach Official Halloween Bar Crawl
Saturday at 3:00 PM
Newport Beach · Baja Sharkeez
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Newport Beach Official Halloween Bar Crawl
Saturday at 3:00 PM
Newport Beach · Baja Sharkeez
Almost full
Hive & Haunted
Saturday at 4:00 PM
Irvine · Hive and Honey Rooftop Bar
Almost full
Hive & Haunted
Saturday at 4:00 PM
Irvine · Hive and Honey Rooftop Bar
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56th Annual Opal, Gem & Jewelry Show
Saturday at 10:00 AM
Orange · The Velvet Rose Event Center
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56th Annual Opal, Gem & Jewelry Show
Saturday at 10:00 AM
Orange · The Velvet Rose Event Center
Sales end soon
Newport Beach Halloween Party Pub Crawl 2026 Halloween Night
Saturday at 6:00 PM
Newport Beach · Baja Sharkeez
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Newport Beach Halloween Party Pub Crawl 2026 Halloween Night
Saturday at 6:00 PM
Newport Beach · Baja Sharkeez
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Newport Beach VIP Halloween Party Pub Crawl 2026 Halloween Night
Saturday at 6:00 PM
Newport Beach · Baja Sharkeez
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Newport Beach VIP Halloween Party Pub Crawl 2026 Halloween Night
Saturday at 6:00 PM
Newport Beach · Baja Sharkeez
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COLLEGE PLOTS: PROJECT NIGHTMARE @ OC FAIR GROUNDS | 10/31ST | 18+
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
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COLLEGE PLOTS: PROJECT NIGHTMARE @ OC FAIR GROUNDS | 10/31ST | 18+
Saturday at 10:00 PM
Costa Mesa · OC Fair & Event Center
Sales end soon
HUNTINGTON BEACH ZOMBIE CRAWL - Halloween Bar Crawl - 8+ Bars - Oct 30 & 31
Friday at 7:00 PM + 1 more
Huntington Beach · Fred's Mexican Cafe
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HUNTINGTON BEACH ZOMBIE CRAWL - Halloween Bar Crawl - 8+ Bars - Oct 30 & 31
Friday at 7:00 PM + 1 more
Huntington Beach · Fred's Mexican Cafe

Trends in Costa Mesa

Explore more trends

OC Fairgrounds Halloween Costume Party, October 31st

OC Fairgrounds Halloween Costume Party, October 31st

OC FairGrounds Halloween Night, October 31st $10 w/rsvp before 10:30pm

OC FairGrounds Halloween Night, October 31st $10 w/rsvp before 10:30pm

PROJECT NIGHTMARE @ OC FAIR & EVENT CENTER | OCTOBER 31ST

PROJECT NIGHTMARE @ OC FAIR & EVENT CENTER | OCTOBER 31ST

Haunted HEAT Halloween

Haunted HEAT Halloween

PROJECT NIGHTMARE @ OC FAIRGROUNDS SATURDAY OCT 31ST | HALLOWEEN

PROJECT NIGHTMARE @ OC FAIRGROUNDS SATURDAY OCT 31ST | HALLOWEEN

October 31st - 11:00am - Simply Scary Sugar Cookie Decorating Class!

October 31st - 11:00am - Simply Scary Sugar Cookie Decorating Class!

Halloween Night @ OC Fairgrounds $10 w/rsvp before 10:30pm

Halloween Night @ OC Fairgrounds $10 w/rsvp before 10:30pm

PROJECT NIGHTMARE @ OC FAIRGROUNDS | 10/31ST | $10 W/RSVP BEFORE 10:30PM

PROJECT NIGHTMARE @ OC FAIRGROUNDS | 10/31ST | $10 W/RSVP BEFORE 10:30PM

Peaches & Punches : Halloween Edition

Peaches & Punches : Halloween Edition

TRICK or TREAT HALLOWEEN NIGHT

TRICK or TREAT HALLOWEEN NIGHT

HALLOWEEN NIGHT @ OC FAIRGROUNDS $10 W/RSVP BEFORE 10:30PM | 18+

HALLOWEEN NIGHT @ OC FAIRGROUNDS $10 W/RSVP BEFORE 10:30PM | 18+

PROJECT NIGHTMARE | OCT 31ST | HALLOWEEN NIGHT @ OC FAIR & EVENT CENTER

PROJECT NIGHTMARE | OCT 31ST | HALLOWEEN NIGHT @ OC FAIR & EVENT CENTER

Palenque Costa Mesa: Halloween Costume Party

Palenque Costa Mesa: Halloween Costume Party

Newport Beach Official Halloween Bar Crawl

Newport Beach Official Halloween Bar Crawl

Hive & Haunted

Hive & Haunted

56th Annual Opal, Gem & Jewelry Show

56th Annual Opal, Gem & Jewelry Show

Newport Beach Halloween Party Pub Crawl 2026 Halloween Night

Newport Beach Halloween Party Pub Crawl 2026 Halloween Night

Newport Beach VIP Halloween Party Pub Crawl 2026 Halloween Night

Newport Beach VIP Halloween Party Pub Crawl 2026 Halloween Night

COLLEGE PLOTS: PROJECT NIGHTMARE @ OC FAIR GROUNDS | 10/31ST | 18+

COLLEGE PLOTS: PROJECT NIGHTMARE @ OC FAIR GROUNDS | 10/31ST | 18+

HUNTINGTON BEACH ZOMBIE CRAWL - Halloween Bar Crawl - 8+ Bars - Oct 30 & 31

HUNTINGTON BEACH ZOMBIE CRAWL - Halloween Bar Crawl - 8+ Bars - Oct 30 & 31

Things to do around Costa Mesa

Trends in Costa Mesa

1. Halloween party

2. Sound bath

3. Halloween parties orange county

4. Lucha libre

5. Stand up comedy

6. Warehouse sale

7. Latte art

8. Volunteer

9. Free kids

10. Trick or treat

11. Halloween

12. Reformation