City/County Addressing

The Address Coordinator is responsible for the issuing of new addresses in Lewis and Clark County and the incorporated cities of Helena and East Helena. Duties include maintaining the Address and Road files, approving new road names and readdressing issues for Lewis and Clark County.

Master Street Address Guide

The Master Street Address Guide is a list of all the streets and roads in Lewis & Clark County by name.  The community name is provided along with the Emergency Response number which is a combination of Fire, Police and Ambulance services that would respond to an address.

Master Street Address Guide

Approved Road Names But Not Yet Platted

The approved road names is a list of of all roads that have been approved and are waiting to be final platted.

Approved Road Names



Contact Information

City/County Address Coordinator
316 N. Park Ave. Room 207
Helena, MT. 59623

Phone: 406-447-8367
Fax: 406-447-8386


Policies, Resolutions & Conventions

Public Works:
County Road Naming and Addressing Standards

Community Development Subdivision Regulations:
Road Naming, Road Sign, and Installation Conventions

Street Type Designations

Resolution 2004-16

Additional Maps

GIS Department