Well documented: both fact-checkers confirmed it in independent sources.Supported: backed by a reliable source; one checker could confirm it.Disputed or traditional account: sources disagree, and we show each side.

The timeline is being fact-checked

Each entry is written by a researcher, checked by two independent fact-checkers, challenged by a skeptic, and signed off before it appears here. The first chapters are on their way.

400 million to 14,000 years ago

Ice and Water

How an ancient sea, the ice sheets and the Niagara River shaped the island.

Ancient times to the 1650s

First Peoples

The Indigenous nations whose history on the river reaches back thousands of years and continues today.

1650s to 1783

Nations and Empires on the Niagara

The Haudenosaunee, France and Britain contest the river and its portage.

1783 to the early 1830s

A Contested Island

Treaties with the Senecas, a new border, and New York's purchase and sale of the island.

1830s to the 1860s

Timber, Farms and a New Town

A timber company cuts the white oak, farm families clear the land, and islanders form a town of their own.

1850s to 1935

The Resort Island

Picnic groves, hotels and private clubs draw Buffalo's summer crowds, while island farms depend on the ferries.

1935 to the 1960s

The Bridges Arrive

Bridges, parks and highways turn the island into a growing suburb.

1970s to today

Island Life Today

A growing town that still feels like an island.

How this timeline is made

  1. Research. A researcher drafts each entry from primary records, histories and archives, citing every claim.
  2. Two fact-checks. Two checkers work independently, confirming each claim in its sources without seeing each other's notes.
  3. A skeptic. A third reviewer looks for myths, anachronisms and claims that go beyond their sources.
  4. Sign-off. Nothing appears here until a person reviews the result and approves it.

Where sources disagree, we say so and show each side. Oral traditions and local legends are labeled as such.