The Most Unionized Industries in the U.S.

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After decades of declining power and influence, organized labor in the U.S. is making a comeback.

The COVID-19 pandemic has set off a number of shifts in the labor market that have given workers more power. Labor participation rates fell sharply early in the pandemic and still have not recovered to pre-pandemic levels. The Great Resignation saw millions of workers leave their jobs in search of better pay or working conditions. With the labor market still tight, employers have struggled to recruit and retain employees.

In this context, workers have been organizing at rates not seen in decades. One of the most high-profile examples is the union drive at Starbucks stores across the U.S. over the last year. Around 250 Starbucks locations have voted to unionize since the first Starbucks union formed in Buffalo, NY late in 2021. Employees at other major companies have also attempted unionization, including retail and factory workers at Apple and Amazon. And the trend extends to white collar industries like tech, academia, and media, where unionization has historically been limited.

According to the National Labor Relations Board, 1,522 votes on unionization have taken place so far in 2022. This is the highest number of union elections since 2015 and an increase of more than 50% over 2021.

The recent uptick in unionization could begin to reverse a decades-long decline in union membership rates. The peak of union membership over the last 50 years was in 1979, when 24.1% of American workers were union members. That figure has since fallen by more than half, with only 10.3% of workers in a union as of 2021. In raw numbers, there are nearly 7 million fewer union members in the U.S. now than there were in the late 1970s.

Recent trends in unionization are significant to bother workers and employers. Unionization and collective bargaining materially affect the compensation and working conditions that workers experience, for better or for worse. In turn, these factors can affect employers’ ability to staff their businesses and the overhead costs they must pay to operate.

Compensation is one of the most notable differences between unionized and non-unionized workers, as unions are often able to negotiate for higher wages. And as unions’ influence has declined over time, so too has the gap in compensation between union and non-union employee wages. At the height of unionization in the late 1970s and early 1980s, union members made over 30% more per hour than their non-union counterparts. Today, union members continue to earn more than non-union workers, but the gap between the two is just 11%.

The new growth in union membership is unlikely to return the U.S. to historic levels of unionization, and union representation will continue to be stronger in some industries than others. Certain sectors of the economy have significantly higher rates of union membership than others, including transportation, utilities, public administration, and education. At the highest end, some industries have union membership rates greater than 50%.

The data used in this analysis is from Unionstats.com. Researchers at Smartest Dollar calculated the union membership rate for 247 industries, ranking them from highest to lowest. In the event of a tie, the industry with the greater union coverage rate was ranked higher.

Here are the most unionized industries.

Industries With the Highest Union Membership Rates

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15. Administration of economic programs and space research

Union membership rate: 25.0%
Union coverage rate: 28.1%
Total union membership: 138,656
Total union coverage: 156,072
Sector: Public Administration

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14. Pulp, paper, and paperboard mills

Union membership rate: 25.1%
Union coverage rate: 26.1%
Total union membership: 47,959
Total union coverage: 49,928
Sector: Nondurable Goods Manufacturing

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13. Administration of environmental quality and housing programs

Union membership rate: 25.2%
Union coverage rate: 28.8%
Total union membership: 76,932
Total union coverage: 88,138
Sector: Public Administration

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12. Natural gas distribution

Union membership rate: 25.6%
Union coverage rate: 25.6%
Total union membership: 29,094
Total union coverage: 29,094
Sector: Utilities

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11. Administration of human resource programs

Union membership rate: 26.2%
Union coverage rate: 29.5%
Total union membership: 332,403
Total union coverage: 373,761
Sector: Public Administration

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10. Sewage treatment facilities

Union membership rate: 26.4%
Union coverage rate: 28.0%
Total union membership: 30,428
Total union coverage: 32,259
Sector: Utilities

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9. Public finance activities

Union membership rate: 27.2%
Union coverage rate: 33.0%
Total union membership: 90,118
Total union coverage: 109,429
Sector: Public Administration

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8. Foundries

Union membership rate: 29.5%
Union coverage rate: 29.5%
Total union membership: 15,053
Total union coverage: 15,053
Sector: Durable Goods Manufacturing

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7. Air transportation

Union membership rate: 38.4%
Union coverage rate: 40.2%
Total union membership: 231,414
Total union coverage: 242,337
Sector: Transportation & Warehousing

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6. Elementary and secondary schools

Union membership rate: 39.1%
Union coverage rate: 43.6%
Total union membership: 3,457,197
Total union coverage: 3,862,835
Sector: Educational Services

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5. Justice, public order, and safety activities

Union membership rate: 40.9%
Union coverage rate: 43.2%
Total union membership: 1,093,245
Total union coverage: 1,153,724
Sector: Public Administration

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4. Bus service and urban transit

Union membership rate: 42.5%
Union coverage rate: 43.5%
Total union membership: 190,016
Total union coverage: 194,251
Sector: Transportation & Warehousing

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3. Rail transportation

Union membership rate: 54.0%
Union coverage rate: 56.8%
Total union membership: 107,632
Total union coverage: 113,299
Sector: Transportation & Warehousing

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2. Postal Service

Union membership rate: 58.8%
Union coverage rate: 64.1%
Total union membership: 369,623
Total union coverage: 403,417
Sector: Transportation & Warehousing