In the IAM Western Territory, Washington and California stand out due to their high number of members, with 42,185 and 37,668 members respectively. These two states are crucial hubs for IAM activities, reflecting their large industrial bases and workforce. Washington is home to Boeing, the largest single employer of IAM members.83

In the Midwest, with a total of 40,242 IAM members, Wisconsin and Illinois make up over half of the territory’s total membership, with 11,442 and 10,614 members respectively. This high number highlights these two states’ central role in the region’s industrial and union activities.

Missouri and Iowa are also key players, with strong industrial bases and more than 5,000 members each.93

Although IAM’s Southern Territory is second to the IAM Western Territory in member density with 66,011 members in total, every state in the Territory (excepting Puerto Rico and the Virgin Islands.

Kansas accounts for 22.23% of all IAM members in the Southern Territory, making it the largest state in terms of membership. Texas follows with 19.1% of the members. Florida and Georgia also have significant IAM presence. The high membership in Kansas is primarily due to the significant aerospace industry presence in Wichita and other parts of the state.

The IAM Eastern Territory, with 49,211 IAM members, includes two of the top ten IAM

union-dense states in the IAM’s territory, and it has significant membership in several different states.110 The territory includes New York, Washington, DC, Michigan, Ohio, and Pennsylvania, and West Virginia.

Quebec makes up nearly half of the Canadian Territory’s total membership. Ontario–Canada’s most populated province–also boasts a strong membership of over 12,000.119 The IAM’s Air Transportation Territory only covers the United States, so Canadian workers in this industry are included in the country’s overall membership totals.

The IAM Air Transport Territory represents over 60,000 workers, including mechanics, customer service representatives, ramp workers, flight attendants, security agents and Network Operations Control agents for commercial and freight travel. These members are spread across 25 states, with Illinois making up over 40% of the Territory’s workforce. Just five states–Illinois, Texas, Washington, Hawaii, and California–account for over 75% of the territory’s membership.124 Major employers in the industry include United Airlines, Southwest Airlines, American Airlines, Hawaiian Airlines, Spirit Airlines, Alaska Airlines, and Swissport.125 A small percentage of the IAM Air Transport members work in wholesale distribution of petroleum and petroleum products, which are essential for fueling and maintaining aircraft.

The Transportation Communications Union (TCU/IAM) and IAM District 19 together form the IAM Rail Division, representing tens of thousands of ticket agents and rail machinists who repair locomotives and heavy equipment.152 The IAM’s Rail Division membership is spread across 31 states and the District of Columbia, with DC and Virginia having particularly high membership numbers.153

The vast majority of rail division members work for line-haul railroads, which transport passengers or cargo over long distances on mainline rail networks.154 When it comes to rail freight, the US Department of Transportation’s Federal Railroad Administration shows a roughly even split in overall rail cargo between consumer goods and bulk commodities, like agriculture.

The IAM’s DC and Vicinity Territory represents a diverse range of employees within the federal government. Despite the territory’s name, this Territory actually has members in 28 states through the National Federation of Federal Employees (NFFE), an IAM-affiliated national union that represents 110,000 federal workers. NFFE members include 50,000 civilian military employees, all passport processing workers, 10,000 healthcare professionals in the Veterans Administration, 10,000 Forest Service workers caring for federal lands, and 10,000 Wildland Firefighters.186 NFFE members can be found in 35 additional government agencies including the Government Service Administration. Outside the NFFE, over 36,000 additional IAM members work for federal contractors under the Service Contract Act (SCA). SCA contractors perform a range of jobs from mechanics, maintenance, operations, and training. Below is a geographic and sectoral breakdown of the territory’s membership.