---
title: "Decentralization — AP Human Geography Definition"
description: "Decentralization is the dispersal of people, jobs, and urban functions away from central cities, creating edge cities, exurbs, and boomburbs in AP HUG Unit 6."
canonical: "https://fiveable.me/ap-hug/key-terms/decentralization"
type: "key-term"
subject: "AP Human Geography"
unit: "Unit 6"
---

# Decentralization — AP Human Geography Definition

## Definition

In AP Human Geography, decentralization is the process by which population, economic activity, and urban functions move outward from the central city to peripheral areas, producing new land-use forms like edge cities, exurbs, and boomburbs (EK PSO-6.A.4, Topic 6.2).

## What It Is

Decentralization is what happens when the central city stops being the only [place](/ap-hug/key-terms/place "fv-autolink") where urban stuff happens. Population, jobs, retail, and even corporate headquarters disperse outward from the [core](/ap-hug/key-terms/core "fv-autolink") to the metro area's edges. It's the umbrella process behind suburbanization and sprawl, and the CED groups all three together in EK PSO-6.A.4 as the forces creating new land-use forms.

The classic example is a corporation moving its headquarters out of the central business district (CBD) and into an office park near a highway interchange. When enough offices, shopping centers, and hotels cluster out there, you get an **edge city**, a node of urban activity that exists outside the traditional downtown. Decentralization also produces **[exurbs](/ap-hug/key-terms/exurbs "fv-autolink")** (semi-rural communities beyond the suburbs) and **boomburbs** (rapidly growing suburban cities). The big idea is that the city's functions no longer have a single center. They've scattered across the whole metropolitan region, which creates new challenges like longer commutes, car dependency, and sprawl.

## Why It Matters

Decentralization lives in **[Unit 6](/ap-hug/unit-6 "fv-autolink"): Cities and Urban Land-Use Patterns and Processes**, specifically Topic 6.2 (Cities Across the World). It directly supports learning objective **[AP Human Geography](/ap-hug "fv-autolink") 6.2.A**, which asks you to explain the processes that initiate and drive urbanization and suburbanization. EK PSO-6.A.4 names decentralization explicitly alongside suburbanization and sprawl as the processes that created edge cities, exurbs, and boomburbs. If you can't explain decentralization, you can't explain why modern metropolitan areas look the way they do, and that's a core Unit 6 skill. It also sets up later Unit 6 topics on sprawl's consequences, like sustainability problems and urban land-use challenges. For the full picture of urbanization processes, start with the [6.2 Cities Across the World study guide](https://library.fiveable.me/ap-hug/unit-6/cities-across-world/study-guide).

## Connections

### Edge cities, exurbs, and boomburbs (Unit 6)

These three land-use forms are decentralization made visible. [Edge cities](/ap-hug/key-terms/edge-cities "fv-autolink") are the clearest case, since they're concentrations of offices and retail that grew up at highway interchanges instead of downtown. If an MCQ describes shopping centers and office complexes appearing along a highway corridor outside a major city, decentralization is the process and edge city is the form.

### [Burgess's concentric zone model (Unit 6)](/ap-hug/key-terms/burgesss-concentric-zone-model)

Burgess's model assumes one CBD at the center with everything radiating outward. Decentralization breaks that assumption. Once jobs and retail scatter to the edges, you need multiple-nuclei or galactic city models instead. Decentralization is basically the reason newer urban models exist.

### [Borchert's Epochs of Transportation Growth (Unit 6)](/ap-hug/key-terms/borcherts-epochs-of-transportation-growth)

Borchert shows that [transportation technology](/ap-hug/key-terms/transportation-technology "fv-autolink") shapes urban form. Decentralization is the auto-era chapter of that story. Highways and cars made it possible for people and businesses to leave the core, because you no longer needed to be near the rail hub or streetcar line downtown.

### [Gentrification (Unit 6)](/ap-hug/key-terms/gentrification)

[Gentrification](/ap-hug/key-terms/gentrification "fv-autolink") is a useful contrast because it runs in the opposite direction. Decentralization pushes people and money out of the core; gentrification pulls wealthier residents back into central-city neighborhoods. FRQs love asking you to compare flows into versus out of the urban core.

## On the AP Exam

Decentralization shows up most often in multiple-choice scenario questions. A typical stem describes economic activity moving outward, like corporations relocating headquarters from the CBD to edge cities, and asks you to name the process. You should also be ready to go the other direction, reading a description of an edge city or boomburb and identifying decentralization as the process that created it. No released FRQ has used the term verbatim, but decentralization is exactly the kind of process FRQs ask you to explain when they cover suburbanization, sprawl, or changing metropolitan form. The move that earns points is connecting process to outcome, so practice sentences like "decentralization of employment created edge cities, which increased car dependency and sprawl." Don't confuse it with urbanization itself; the shift from farms to cities is a different process, and the exam tests whether you can tell them apart.

## decentralization vs Suburbanization

These overlap but aren't identical. Suburbanization is specifically the movement of *people and residences* out of the central city into suburbs. Decentralization is broader, covering the dispersal of population AND economic activity AND urban functions, including jobs, retail, and corporate headquarters. A family moving to a subdivision is suburbanization. A Fortune 500 company moving its headquarters from downtown to an edge city is decentralization. The CED lists them as related but separate processes in EK PSO-6.A.4, so know both.

## Key Takeaways

- Decentralization is the dispersal of population, economic activity, and urban functions from the central city outward to peripheral areas of the metro region.
- EK PSO-6.A.4 groups decentralization with suburbanization and sprawl as the processes that created edge cities, exurbs, and boomburbs.
- Suburbanization is about people moving to the suburbs; decentralization also includes jobs, retail, and corporate functions leaving the core.
- A corporation moving its headquarters from the CBD to an edge city is the classic exam example of decentralization.
- Decentralization explains why single-center urban models like the concentric zone model fail to describe modern metro areas with multiple activity nodes.
- Decentralization creates new challenges, including sprawl, car dependency, and longer commutes, which feed into later Unit 6 topics on urban sustainability.

## FAQs

### What is decentralization in AP Human Geography?

Decentralization is the process by which population, economic activity, and urban functions disperse from the central city to outlying areas of the metro region. It's named in EK PSO-6.A.4 of Topic 6.2 as a driver of edge cities, exurbs, and boomburbs.

### Is decentralization the same as suburbanization?

No. Suburbanization is specifically people moving their homes from the central city to the suburbs. Decentralization is broader and includes economic activity too, like offices, retail, and corporate headquarters relocating away from the CBD.

### What is an example of decentralization?

A corporation moving its headquarters from a downtown CBD to an edge city near a highway interchange is the go-to exam example. Shopping centers and office complexes developing along a highway corridor outside a major city also count.

### Is decentralization the opposite of urbanization?

Not exactly. Urbanization is the shift of population from rural areas into cities, while decentralization is movement within metro areas from the core to the periphery. A region can urbanize and decentralize at the same time, and many do.

### What urban forms does decentralization create?

Edge cities (concentrations of business and retail outside the traditional downtown), exurbs (semi-rural communities beyond the suburbs), and boomburbs (fast-growing suburban cities). The CED lists all three as outcomes of suburbanization, sprawl, and decentralization.

## Related Study Guides

- [6.2 Cities Across the World](/ap-hug/unit-6/cities-across-world/study-guide/QAwLNSgI03JPsEeMON7L)

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