A territory won by a pig and a Kaiser's decree

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: The San Juan Islands weren't always a peaceful Washington getaway. They were once the center of a tense maritime standoff between the U.S. and Great Britain, culminating in a bizarre, bloodless conflict famously known as the Pig War.

A territorial disagreement involving Great Britain and the United States occurred over the San Juan Islands between 1846 and 1872. The tension reached a peak in 1859 with the 'Pig War,' a conflict sparked by a boundary disagreement. Despite the name, the confrontation remained entirely bloodless, eventually concluding through an arbitration process led by Kaiser Wilhelm I. This international mediation ultimately awarded the islands to the United States.

The county's geography is defined by its relationship with the water. Water covers 447 square miles, representing a massive 72% of the total area, despite it being Washington's smallest county by land. The region consists of a cluster of more than 400 islands and rocks, though only 134 of these are officially named. Most of the population resides on the four largest islands, which are the only ones served by the Washington State Ferries.

Today, the county faces unique logistical and social challenges shaped by its maritime isolation. Because there are no municipal police departments, the county sheriff manages law enforcement across the archipelago using a dedicated marine unit with four small patrol craft. The county also maintains a distinct social profile: it holds the highest concentration of religiously unaffiliated people in the United States, with 49% of the population identifying as such. Furthermore, while it boasts the state's highest per capita income, it also experiences the highest rate of income inequality in Washington due to high housing costs.

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topics-washington-history, maritime-geography, territorial-disputes

The county spans 621 square miles (1,610 km2), with 174 square miles (450 km2) as land and 447 square miles (1,160 km2) (72%) as water.

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