Industry Description
This industry includes all establishments of the U.S. Postal Service.
Business Examples
Common types of business activities within US SIC 4311 - United States Postal Service are:
- United States Postal Service
IBISWorld Industry Research Report
Postal Service in the US (49111)
Revenue 2025
$91.9bn
Growth 2025
-0.23%
Key Trends
As online communication, media and transactions have grown in popularity, traditional mail has become less popular
The increased popularity of the Internet has reduced a major revenue stream for the industry
Revenue for the postal service will fall amid high external competition
Products and Services
US-SIC Hierarchy 4311 - United States Postal Service
US-SIC Code 4311 - United States Postal Service sits in the 2-digit United States Postal Service sector. US SIC codes can be 2 to 8 digits and the further along the hierarchy, the more detailed and specific the category will be.
Division: E
Division Title: Transportation, Communications, Electric, Gas, and Sanitary Services
2 Digits 3 Digits 4 Digits
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411 Local and Suburban Passenger Transportation
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412 Taxicabs
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413 Intercity and Rural Bus Transportation
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414 Bus Charter Service
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415 School Buses
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417 Terminal and Service Facilities for Motor Vehicle
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421 Trucking and Courier Services, Except Air
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422 Public Warehousing and Storage
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423 Terminal and Joint Terminal Maintenance
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431 United States Postal Service
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441 Deep Sea Foreign Transportation of Freight
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442 Deep Sea Domestic Transportation of Freight
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443 Freight Transportation On the Great Lakes-st.
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444 Water Transportation of Freight, Not Elsewhere
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448 Water Transportation of Passengers
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449 Services Incidental To Water Transportation
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451 Air Transportation, Scheduled, and Air Courier
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452 Air Transportation, Nonscheduled
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458 Airports, Flying Fields, and Airport Terminal
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461 Pipelines, Except Natural Gas
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472 Arrangement of Passenger Transportation
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473 Arrangement of Transportation of Freight and Cargo
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474 Rental of Railroad Cars
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478 Miscellaneous Services Incidental To Transportation
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481 Telephone Communications
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482 Telegraph and Other Message Communications
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483 Radio and Television Broadcasting Stations
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484 Cable and Other Pay Television Services
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489 Communications Services, Not Elsewhere
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491 Electric Services
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492 Gas Production and Distribution
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493 Combination Electric and Gas, and Other Utility
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494 Water Supply
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495 Sanitary Services
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496 Steam and Air-conditioning Supply
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497 Irrigation Systems
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Extended US-SIC Hierarchy for 4311 - United States Postal Service
For business marketing and targeting, US SIC Codes have been extended to provide more specific classifications within US-SIC 4311 - United States Postal Service. Extended US SIC Codes are being continuously updated to reflect the current business environment.
6 Digit SIC Codes
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431101 Post offices
8 Digit SIC Codes
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43110000 U.S. postal service
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