Addressing

The Addressing Office provides an efficient and uniform location identification system for the provision of emergency services. The Office is responsible for the assigning addresses in Lewis and Clark County and the incorporated cities of Helena and East Helena. Duties include maintaining address and road databases, reviewing applications, and sharing information with service providers. 

Policies, Resolutions, and Conventions

Resolution 2004-16(PDF, 246KB)
Coordinated Assignment or Reassignment of Roads and Addresses

Resolution 2021-63(PDF, 3MB)
Regulations for Naming and Renaming Roads, adopted July 2021

Road Naming Petition Form(PDF, 343KB)
* Please review Resolution 2021-63

Emergency Response Number(PDF, 166KB)

Addressing Conventions(PDF, 106KB)

Street Type Designations(PDF, 267KB)

Master Street Address Guide(XLSX, 157KB) (MSAG)
Spreadsheet of road names in Lewis & Clark County.

Approved/Reserved Road Names(XLSX, 23KB)
Spreadsheet of approved/reserved roads that have yet to be final platted.