District Mapping Tools

The City is in the process of moving from an at-large election system to a by-district election system. To draw these new districts we need to hear from you as it’s important to know about your community so that the district lines can amplify the voices of residents.

We need your help to build a community map and our new city council district map! Please use the online tool called DistrictR to identify the boundaries of your community and provide your proposed city council district lines.

Click here or on the map icon on this page to directly access the Diamond Bar online mapping tool

Prefer to use a pen and paper? A PDF map with population estimates is available. Completed draft maps may be submitted by email to districting.diamondbar@civicservice.com or dropped off at City Hall, Attn: City Clerk's Office, 21810 Copley Drive, Diamond Bar, CA 91765.

• Population Map
  • Chinese (中文)
  • Korean (한국어)
  • Spanish

Map Submission Tips

• Make sure to Save and Share to Gallery your draft map to make it visible in the public gallery and ensure it has been submitted online
• Draft maps may be printed and emailed to districting.diamondbar@civicservice.com
• Draft maps may be printed and dropped off at City Hall, located at 21810 Copley Drive.
• Residents may submit multiple maps, there is no limit to the number of submissions
• Maps may outline boundaries for a single district or community of interest or up to five districts
• New districts should have a population of around 11,000
• The largest district should be no more than ~1,000 people greater than the smallest district
• Join the April 9 in-person public workshop to learn more about the mapping process

Submission Deadline

Submit maps online using DistrictR, by email to districting.diamondbar@civicservice.com or drop-off printed maps to City Hall, located at 21810 Copley Drive, by Tuesday, April 12, 2022.

Draft district maps will be considered for approval at the April 19 City Council meeting for introduction of the ordinance establishing the Council districts.  The ordinance will then be brought before the Council for second reading and final adoption at the May 3 City Council meeting

Additional Information

• At the March 15 public hearing the City Council unanimously agreed to create five voting districts and for the mayor to continue to be selected by a majority vote of all members of the city council during the annual reorganization meeting in December.
• Learn more about the districting process in diamond bar by visiting the City Council Districting webpage and about communities by visiting the Community of Interest survey webpage.
• For questions, send an email to districting.diamondbar@civicservice.com