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

MondayThursday:
7:30 AM–5:30 PM

Friday:
8:00 AM–5:00 PM

Have a comment, question or concern?

Contact Us!

Appointments

Book your appointment for 

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

Directory

DepartmentContact Information
City Clerk/Records(909) 395-2009
Management (909) 395-2005
Economic Development (909) 395-2022
Business License (909) 395-2562
Fire Plan Check (909) 395-2025
Engineering  (909) 395-2036
Planning (909) 395-2023
Building (909) 395-2023

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