Postal clerk (abbreviated as PC) was a United States Navy occupational rating.

Postal clerks:

• Operate US Navy post offices
• Supervise, organize and establish or disestablish a US Navy post office
• Perform postal counter work, including sale of stamps and money orders
• Process incoming and outgoing mail
• Route mail
• Maintain a mail directory
• Process official mail
• Maintain security of postal effects and mail matter
• Process claims and inquiries
• Prepare and file postal correspondence, records and reports