The phrase “the Seven Kingdoms of Westeros” is traditional, but on the map there are actually nine major regions under the Iron Throne in most of the story.

Direct answer

In the time of Game of Thrones / main-book era, there are nine political regions in Westeros, even though the realm is still called “the Seven Kingdoms.”

Why it’s called “Seven Kingdoms”

Originally, when Aegon the Conqueror invaded Westeros about 300 years before the main story, there really were seven independent realms he set out to unite:

  1. The North
  2. The Vale
  3. The Westerlands
  4. The Reach
  5. The Stormlands
  6. Dorne
  7. The Kingdom of the Isles and the Rivers (Iron Islands + Riverlands ruled together)

The name “Seven Kingdoms” comes from those seven original sovereign kingdoms at the time of Aegon’s Conquest.

Over time, the political map changed, but the old name stuck as a title and bit of in‑world branding.

The nine regions in the main era

By the time of the books and TV series, Aegon’s unified realm has been subdivided into nine administrative regions (all still colloquially called part of the “Seven Kingdoms”):

  • The North
  • The Vale
  • The Westerlands
  • The Riverlands
  • The Iron Islands
  • The Reach
  • The Stormlands
  • Dorne
  • The Crownlands (around King’s Landing)

A common fan shorthand is: “Seven kingdoms, nine regions.”

Quick HTML table: 7 vs 9

html

<table>
  <thead>
    <tr>
      <th>Context</th>
      <th>Number of kingdoms/regions</th>
      <th>What it refers to</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Aegon’s Conquest era</td>
      <td>7</td>
      <td>Seven independent realms before unification (e.g., North, Vale, Reach, Stormlands, Westerlands, Dorne, Isles &amp; Rivers)</td>
    </tr>
    <tr>
      <td>Main series era</td>
      <td>9</td>
      <td>Nine regions under the Iron Throne: North, Vale, Westerlands, Riverlands, Iron Islands, Reach, Stormlands, Dorne, Crownlands</td>
    </tr>
  </tbody>
</table>

In-universe “gotcha” fans like to quote

Forum and lore discussions often phrase it like this:

“It’s still called the Seven Kingdoms because that’s how many kingdoms Aegon conquered, but by the time of the story the realm has been reorganized into nine regions.”

So if someone on a forum asks “how many kingdoms in Westeros,” the lore-nerd answer is:

  • Seven historically (the original sovereign kingdoms under Aegon’s conquest name).
  • Nine practically, when you look at the political map during the story.

TL;DR: Westeros is called the Seven Kingdoms, but during most of the story it’s divided into nine major regions under the Iron Throne.

Information gathered from public forums or data available on the internet and portrayed here.