---
title: "Department of State — Definition & Meaning | Model Diplomat"
description: "The Department of State is the U.S. executive department for foreign policy and diplomacy, led by the Secretary of State, a key Cabinet member."
url: "https://modeldiplomat.com/learn/glossary/department-of-state"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The Department of State is the executive department of the United States federal government responsible for conducting foreign policy, diplomacy, and international relations.
- When was the Department of State established and what was it first called?
- Where does the Secretary of State rank in presidential succession?
- What are the five Foreign Service career tracks?
- What is the constitutional basis for the Department's foreign-affairs role?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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