---
title: "Subnational Units — AP Human Geography Definition"
description: "Subnational units are regional or local government divisions inside a state. Their power depends on whether the state is unitary or federal, a core Unit 4 idea."
canonical: "https://fiveable.me/ap-hug/key-terms/subnational-units"
type: "key-term"
subject: "AP Human Geography"
unit: "Unit 4"
---

# Subnational Units — AP Human Geography Definition

## Definition

In AP Human Geography, subnational units are the regional or local governmental divisions inside a country (states, provinces, counties), created by internal boundaries. How much real power they hold depends on whether the country is a federal state or a unitary state.

## What It Is

Subnational units are the political divisions that exist below the national level. Think US states, Canadian provinces, French departments, Nigerian states, or your local county and school district. Every country draws [internal boundaries](/ap-hug/unit-4/internal-boundaries/study-guide/2XTlTk9efO2nfIkMo2Dp "fv-autolink") to organize governance, deliver services, and run elections, and each piece those boundaries create is a subnational unit.

Here's the part the AP exam actually cares about. The same-looking map of provinces can mean totally different things depending on the country's governance structure. In a **[federal state](/ap-hug/unit-4/forms-governance/study-guide/mLqAsP3OKIiniCNUbmp0 "fv-autolink")** (like the United States or Brazil), subnational units hold real constitutional power that the national government can't just take away. In a **unitary state** (like France or Japan), subnational units are basically administrative conveniences. The central government created them, controls them, and can redraw or override them. So the term isn't just "smaller map pieces." It's the key to explaining how power is distributed inside a country.

## Why It Matters

This term lives in **Topic 4.6 (Internal Boundaries)** in **[Unit 4](/ap-hug/unit-4 "fv-autolink"): Political Patterns and Processes**, supporting learning objective **[AP Human Geography](/ap-hug "fv-autolink") 4.6.A**, which asks you to explain the nature and function of international and internal boundaries. Subnational units are what internal boundaries produce, so you can't fully answer 4.6.A without them. They also connect directly to **EK IMP-4.B.5**, because voting districts are subnational units too, and redistricting and gerrymandering reshape them to change election outcomes at different scales. Beyond Topic 4.6, the concept ties the whole unit together. Federal versus unitary states, devolution, and ethnic separatism all come down to one question. How much power do the subnational units get?

## Connections

### Unitary vs. Federal States (Unit 4)

This is the closest connection and the one the exam tests most. Subnational units exist in both systems, but in a federal state they hold real, protected power, while in a unitary state they mostly carry out decisions made at the center. The 2017 FRQ built an entire question around this distinction.

### Redistricting and Gerrymandering (Unit 4)

Voting districts are subnational units, and EK IMP-4.B.5 says redistricting and gerrymandering affect election results at various scales. When a legislature redraws district lines to favor one party, it's manipulating internal boundaries, which is exactly the Topic 4.6 skill of explaining what internal boundaries do.

### [Devolution (Unit 4)](/ap-hug/key-terms/devolution)

[Devolution](/ap-hug/key-terms/devolution "fv-autolink") is the transfer of power from the central government down to subnational units, like the UK giving Scotland its own parliament. If you understand subnational units, devolution clicks instantly. It's the central government handing those units more of the steering wheel.

### [Autonomous Regions (Unit 4)](/ap-hug/key-terms/autonomous-regions)

An [autonomous region](/ap-hug/key-terms/autonomous-region "fv-autolink") is a special kind of subnational unit that gets extra self-rule, often to accommodate an ethnic or cultural minority. It's the middle ground between an ordinary province and full independence, and it's a common outcome of devolutionary pressure.

## On the AP Exam

Multiple-choice questions usually test whether you can connect subnational units to governance type. A typical stem asks what function internal boundaries serve in a federal system that distinguishes them from administrative divisions in a unitary state. The answer hinges on real, constitutionally protected power versus top-down administration. On the FRQ side, the 2017 exam (Q3) opened with the classification of countries as unitary or federal states and asked for explanation built on exactly this concept. Expect to define the term, give a real-world example (US states, French departments), and explain consequences, like why federal subnational units can pass their own laws or why gerrymandered voting districts change who wins elections. Don't just name the units. Explain what they can and can't do.

## subnational units vs Autonomous regions

All autonomous regions are subnational units, but not all subnational units are autonomous. A regular subnational unit (like a French department or a US county) has whatever standard powers the system gives it. An autonomous region has been granted extra, special self-governing power, usually to manage ethnic or cultural differences, like Hong Kong in China or Greenland in Denmark. If the question is about ordinary internal divisions, say subnational units. If it's about a region with unusual self-rule carved out for it, say autonomous region.

## Key Takeaways

- Subnational units are the regional or local governmental divisions inside a country, like states, provinces, counties, and voting districts.
- In a federal state, subnational units hold real constitutional power; in a unitary state, they mainly administer decisions made by the central government.
- Internal boundaries create subnational units, so this term is central to explaining the function of internal boundaries under AP Human Geography 4.6.A.
- Voting districts are subnational units, which means redistricting and gerrymandering are really fights over how internal boundaries are drawn (EK IMP-4.B.5).
- Devolution means the central government transfers power down to its subnational units, sometimes creating autonomous regions with special self-rule.
- On the exam, always pair the term with the unitary versus federal distinction, because that's how it appears in both MCQs and released FRQs like 2017 Q3.

## FAQs

### What are subnational units in AP Human Geography?

Subnational units are the regional or local governmental divisions inside a country, created by internal boundaries. Examples include US states, Canadian provinces, French departments, counties, and voting districts. The term is part of Topic 4.6 (Internal Boundaries) in Unit 4.

### Do subnational units have the same power in every country?

No, and that's the whole point. In a federal state like the US or Brazil, subnational units hold real power the central government can't simply revoke. In a unitary state like France or Japan, they're administrative divisions the central government controls and can reorganize.

### How are subnational units different from autonomous regions?

An autonomous region is a special type of subnational unit with extra self-governing power, usually granted to accommodate an ethnic or cultural minority. An ordinary subnational unit, like a county or department, just has the standard powers its system assigns. Autonomous is the upgrade, not the default.

### Are voting districts considered subnational units?

Yes. Voting districts are internal political divisions, which makes them subnational units. That's why EK IMP-4.B.5 connects here. Redistricting and gerrymandering redraw these units to influence election results at local, state, and national scales.

### Has the AP exam actually asked about subnational units?

Yes. The 2017 FRQ (Q3) opened by stating that political geographers classify most countries as either unitary or federal states, then asked for explanation built on how internal divisions function differently in each. Multiple-choice questions also test the federal versus unitary distinction directly.

## Related Study Guides

- [4.6 Internal Boundaries](/ap-hug/unit-4/internal-boundaries/study-guide/2XTlTk9efO2nfIkMo2Dp)

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