The country most closely associated with starting Halloween is Ireland , through the ancient Celtic festival of Samhain , which later spread via Irish and Scottish traditions.

Quick Scoop: Who “Started” Halloween?

  • Halloween grew out of the Celtic festival of Samhain, celebrated over 2,000 years ago in what is now Ireland and parts of Scotland.
  • Many modern Halloween customs (bonfires, costumes to ward off spirits, carved lanterns) come from Irish and Scottish folk traditions.
  • Irish and Scottish immigrants later took these customs to North America , where Halloween became the big, candy-filled holiday we know today.

So, if you’re asking “what country started Halloween?” in terms of roots and earliest celebrations, the best single answer is: Ireland (within the broader Celtic world of Ireland and Scotland).

Short origin story

Ancient Celts in Ireland marked the end of harvest and the start of the dark half of the year with Samhain on October 31. They believed the boundary between the living and the dead weakened that night, so people lit bonfires and wore disguises to protect themselves from wandering spirits. Over centuries, Christian festivals like All Hallows’ Day blended with these customs, and this mix eventually evolved into Halloween.

Modern Halloween vs. original roots

Here’s a quick look at how it shifted over time:

[1][3][7][9] [3][4][7] [5][7][3]
Stage Where What it looked like
Ancient Samhain Ireland, Celtic regions Bonfires, rituals, costumes to ward off spirits, end‑of‑harvest festival.
Medieval Christian blend Britain & Ireland All Hallows’ Eve linked with older Samhain traditions.
Modern Halloween USA & Canada, then worldwide Trick‑or‑treating, costumes, pumpkins, horror movies and parties.

Forum-style take & “latest” context

If you saw people arguing online, you’ll usually see three claims:

  • “It started in Ireland ” – focusing on the Samhain roots and Irish folklore.
  • “It’s an American holiday” – pointing out that the big commercial, pop‑culture version was shaped mainly in the United States.
  • “It’s Celtic in general” – a broader view that includes Scotland and parts of Britain as part of the early tradition.

Most historians and cultural sources still highlight Ireland as the “home of Halloween” because of Samhain and the strength of Irish folk customs that later spread globally.

TL;DR: Halloween’s earliest roots come from the Celtic festival Samhain in Ireland (and nearby Celtic regions), but the modern trick‑or‑treat version was heavily shaped in North America.

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