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September 11, 2026Sources cited
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Thousand Island dressing

Thousand Island dressing is a creamy, sweet-tangy condiment made from mayonnaise, ketchup, relish, and seasonings.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated September 11, 2026|2 min read| Fact-checked

Thousand Island dressing is a creamy, sweet-tangy condiment made from mayonnaise, ketchup, relish, and seasonings. It is commonly used on salads, sandwiches, burgers, and as a dip or spread. The name comes from the Thousand Islands region on the upper St. Lawrence River between New York State and Ontario, Canada.

Origin

The dressing is named for the Thousand Islands region along the upper St. Lawrence River. Sources note multiple origin stories, but the geographical name association is consistent across references.

Ingredients and preparation

Basic versions combine mayonnaise, ketchup, sweet pickle relish, onion, and an acid such as vinegar or lemon juice. Recipes commonly recommend chilling the mixture before serving so the flavors blend.

Uses

Thousand Island dressing is used on salads and as a condiment for sandwiches, burgers, and dips. It is especially well known in North American deli and fast-food contexts.

Cultural associations

The dressing appears in popular accounts of Reuben sandwiches and hamburger sauces, and some recipes describe it as a versatile creamy sauce rather than only a salad dressing.

Key facts

  • Thousand Island dressing is a mayonnaise-based condiment blended with ketchup and relish.
  • Its name is linked to the Thousand Islands region between New York and Ontario, Canada.
  • It is widely used as a salad dressing and sandwich condiment, including on Reuben sandwiches.
  • Recipes vary and may include paprika, garlic, Worcestershire sauce, or hot sauce.
  • It is associated in popular food culture with hamburger sauces such as McDonald’s Big Mac sauce.
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Canadian context

The dressing’s name comes from the Thousand Islands region on the border of Ontario and New York, making it directly relevant to Canadian readers and to cross-border regional food history.[2][3][7]

Frequently asked questions

What is Thousand Island dressing?
A creamy condiment made mainly from mayonnaise, ketchup, relish, and seasonings, used as a dressing, dip, or spread.
Where does the name come from?
It is named after the Thousand Islands region on the upper St. Lawrence River, between New York State and Ontario, Canada.
What does it taste like?
It is typically creamy, tangy, and slightly sweet, with savoury notes from onion, pickle, and spices.
What foods is it used with?
It is commonly served with salads, burgers, sandwiches, and dips, and is often associated with Reuben sandwiches.
Are there different recipes?
Yes. Recipes vary widely and may include paprika, garlic, Worcestershire sauce, hot sauce, lemon juice, or sour cream.

References

  1. Simply Recipes — https://www.simplyrecipes.com/recipes/thousand_island_dressing/
    Supports: Name origin, common uses, and popular associations with Reuben sandwiches and Big Mac sauce.
  2. Umami Girl — https://www.umamigirl.com/thousand-island-dressing/
    Supports: Regional origin association and variation in origin stories.
  3. Baked Bree — https://www.bakedbree.com/thousand-island-dressing-recipe
    Supports: Name origin near the Canadian border and typical ingredients/method.
  4. BBC Food — https://www.bbc.co.uk/food/recipes/thousand_island_dressing_47050
    Supports: Typical ingredients, flavouring, and storage guidance.
  5. The Daring Gourmet — https://www.daringgourmet.com/thousand-island-dressing/
    Supports: Core ingredient profile and use as dressing, dip, and spread.