Private company

PJM Interconnection

Electric grid coordinator in the northeastern US

PJM Interconnection LLC (PJM) is a regional transmission organization (RTO) in the United States. It is part of the Eastern Interconnection grid operating an electric transmission system serving all or parts of Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and the District of Columbia.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

  • Industryelectric power industry1
  • HeadquartersValley Forge1
  • Websitewww.pjm.com
  • Legal formlimited liability company1
Rto map 2024
Photo: BlckAssn, CC BY-SA 4.0, via Wikimedia Commons3

PJM Interconnection LLC (PJM) is a regional transmission organization (RTO) in the United States. It is part of the Eastern Interconnection grid operating an electric transmission system serving all or parts of Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and the District of Columbia.2

Sources

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