Ontario Thinks Business home
Clocktower with town square in the background and the sun shining

Contact City of Ontario

City Hall is open to the public Mondays through Fridays, excluding Federal Holidays

Monday–Thursday:
7:30 AM–5:30 PM

Friday:
8:00 AM–5:00 PM

Have a comment, question or concern?

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Resources

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Trash-Related Issues

Special Event Vendor Form

Appointments

Book your appointment for 

  • Building
  • Permits
  • Plan Checks
  • Business License
  • Economic Development
  • Housing
  • Engineering
  • Planning
  • Passports
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Directory

DepartmentContact Information
Broadband(909) 395-2910
Building (909) 395-2023
Business License(909) 395-2022
City Clerk/Records(909) 395-2009
Community Improvement(909) 395-2007
Community Life & Culture(909) 395-2222
Economic Development (909) 395-2005
Engineering  (909) 395-2025
Fire Admin(909) 395-2002
Fire Plan Check (909) 395-2562
Housing(909) 395-2006
Human Resources(909) 395-2442
Library(909) 395-2004
Management (909) 395-2000
Museum(909) 395-2510
Police(909) 395-2001
Planning (909) 395-2036
Public Works(909) 395-2800
Recreation(909) 395-2020
Utilities Customer Services(909) 395-2050

City Facilities

City Hall Annex

415 East B St.
Ontario, California  91764

Ontario Municipal Utilities Company

1333 S Bon View Ave. 
Ontario, CA 91761

Community, Life, & Culture

1425 S Bon View Ave. 
Ontario, CA 91761