NLRB Stats Archive › Annual Reports › FY1948 › Union-authorization election results — by industry
Union-authorization election results — by industry
| Industrial group | Total elections | Total elections | A.F. of L. affiliates authorized | A.F. of L. affiliates authorized | C.I.O. affiliates authorized | C.I.O. affiliates authorized | Unaffiliated authorized | Unaffiliated authorized | No union authorized | No union authorized | Eligible voters | Eligible voters | Valid votes cast | Valid votes cast |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number | Percent | Number | Percent | Number | Percent | Number | Percent | Number | Percent | Number | Percent | Number | Percent | |
| Mining | 103 | 0.6 | 83 | 80.6 | 13 | 12.6 | 4 | 3.9 | 3 | 2.9 | 5,111 | 0.3 | 4,421 | 0.3 |
| Mining — Metal mining | 6 | 0 | 6 | 100 | 0 | 0 | 0 | 0 | 0 | 0 | ||||
| Mining — Coal mining | 12 | 0.1 | 1 | 8.3 | 0 | 0 | 11 | 91.7 | 0 | 0 | ||||
| Mining — Crude petroleum and natural gas production | 19 | 0.1 | 4 | 21 | 12 | 63.2 | 3 | 15.8 | 0 | 0 | ||||
| Construction | 159 | 0.9 | 119 | 87.5 | 0 | 0 | 4 | 2.5 | 14 | 8.8 | 5,654 | 0.3 | 4,851 | 0.3 |
| Wholesale trade | 1,512 | 8.4 | 1,294 | 85.6 | 33 | 2.1 | 89 | 5.9 | 65 | 4.3 | 71,968 | 3.9 | 62,733 | 3.8 |
| Retail trade | 1,239 | 6.8 | 1,069 | 86.3 | 21 | 1.7 | 86 | 6.9 | 50 | 4 | 55,179 | 3 | 49,193 | 3 |
| Finance, insurance, and real estate | 1,419 | 7.9 | 1,408 | 99.2 | 1 | 0.1 | 9 | 0.6 | 1 | 0.1 | 19,066 | 1 | 17,743 | 1.1 |
| Transportation, communication, and other public utilities | 1,812 | 10.1 | 1,456 | 80.4 | 71 | 3.9 | 233 | 12.9 | 52 | 2.8 | 173,773 | 9.4 | 145,774 | 9 |
| Transportation — Highway freight transportation | 692 | 3.9 | 670 | 96.5 | 0 | 0 | 21 | 3 | 1 | 0.1 | 41,591 | 2.2 | 36,798 | 2.3 |
| Services | 244 | 1.3 | 149 | 61.1 | 6 | 2.4 | 84 | 34.4 | 5 | 2 | 9,068 | 0.6 | 7,876 | 0.5 |
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Source data: U.S. NLRB Annual Reports (public domain). Reconstruction by NLRB Stats Archive. Updated June 2026.