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Geographic Distribution of the IAM’s Membership

As previously noted, the IAM's membership is spread across the United States and Canada, with each geography having its own industrial strengths.80 State membership numbers range from nearly 50,000 in Washington to less than 100 in states like Wyoming and South Dakota.81 The “Geographic Distribution and Density of IAM Members in North America” map shows the density of membership in each US state and Canadian province or territory.


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80 International Association of Machinists and Aerospace Workers, “Updated Data on IAM Membership by Industry,” May 22, 2024.

81 International Association of Machinists and Aerospace Workers.

The IAM & the Climate Crisis

In the following pages, we examine the varying, intersecting ways climate change will affect the industries and places where IAM members live and work. First, we will look at the major industries and climate impacts–both current and expected–in each of the IAM’s geographic territories. Then, we will take a deeper dive into threats and opportunities in key IAM- represented industries. Since air transportation, rail, and federal government (DC & Vicinity) workers are both sectors and territories or divisions within the union, our analysis of these three will bridge the two sections.