Industry Sector

Transportation & Public Utilities

Total Companies


Est. Employment


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This industry includes all establishments of the U.S. Postal Service. United States Postal Service


SIC Code 4311 - United States Postal Service is a final level code of the “Transportation & Public Utilities” Division. There are 17,334 companies classified in this industry in the USA with an estimated employment of 337,230 people.

Hierarchy Navigation for SIC Code 4311

Parent Category (less specific)

Industry Examples

Common types of examples within SIC Code 4311 - United States Postal Service are:

  • United States Postal Service

Industry Image

Example photo for industry SIC 4311 - United States Postal Service. This image represents an activity or product found in this industry.

Companies compiles comprehensive business data and executive contact leads for businesses within SIC Code 4311 - United States Postal Service. Some of the leading and most notable companies are listed below. To order a list of companies within SIC Code 4311 - United States Postal Service for marketing (postal mailing, telemarketing, emailing) or analytics-use, click on the link below to “Buy Business List”. Our data analysts are standing by to assist in your list setup and target marketing.

Industry Executives

Would you like to email executives in SIC Code 4311 - United States Postal Service? Below are some of the common job titles available to be targeted.

  • Business Development
  • Chairman
  • C-Level
  • Director
  • Engineering
  • Executive Director
  • Facilities
  • Finance
  • Human Resource
  • IT
  • Manager
  • Marketing
  • Manufacturing
  • Operations
  • Owner
  • Partner
  • President
  • Principal
  • Purchasing
  • Sales
  • Vice President

For specific job title targeting, please provide details in the business list request form.

Executive Email List

Extended SIC Code Categories for SIC 4311

For business marketing and targeting, SIC Codes have been extended to provide more specific classifications within SIC Code 4311 – United States Postal Service. Extended SIC Codes are being continuously updated to reflect the current business environment.

6-digit SIC

  • 431101Post Offices

7-digit SIC

  • 4311001Post Offices

8-digit SIC

  • 43110000U.s. Postal Service