Catalog or catalogue? Both spellings are correct. Catalog is the standard spelling in American English, and catalogue is the standard in British English. The word means the same thing either way: a list of items, such as products, books, or artworks.
This guide explains how to choose between catalog or catalogue for your audience. You will also learn the matching verb forms, how the word is pronounced, where each spelling appears, and which mistakes to avoid.
Quick answer: Catalog or catalogue? Both are correct. Use catalog for American readers and catalogue for British, Australian, and most other international readers. The meaning does not change.
Example: “The store mailed its new catalog.” (US) / “The gallery printed a catalogue.” (UK)
What Does “Catalog” Mean?
A catalog is an organized list of items. The list usually gives names, descriptions, and sometimes prices or reference numbers. It can be printed, online, or stored in a database.
A catalog as a noun
As a noun, catalog has a few common senses:
- A list of products for sale: “She ordered a lamp from the catalog.”
- A list of what a library or collection holds: “Search the library catalog for the title.”
- A list of courses at a school: “The course catalog lists every class.”
A catalog as a verb
As a verb, to catalog means to list or record items in an organized way.
- “The museum staff cataloged every object in the collection.”
- “He cataloged his vinyl records by year.”
The verb forms are catalog, catalogs, cataloged, cataloging.
What Does “Catalogue” Mean?
Catalogue has exactly the same meanings as catalog. Only the spelling is different. It is the usual form in British English.
- “The gallery printed a catalogue for the exhibition.” (noun)
- “I found the book in the university library catalogue.” (noun)
- “The archivist catalogued hundreds of letters.” (verb)
The verb forms are catalogue, catalogues, catalogued, cataloguing. Notice that the “ue” stays in every form.
Catalog vs Catalogue: At a Glance
| Feature | Catalog | Catalogue |
| Main region | United States | UK, Australia, New Zealand, Ireland |
| Meaning | A list of items | A list of items |
| Past tense | cataloged | catalogued |
| -ing form | cataloging | cataloguing |
| Person who catalogs | cataloger | cataloguer |
| Pronunciation | Same | Same |
Is “Catalog” or “Catalogue” Correct?
Both are correct. The choice between catalog or catalogue depends on your readers’ region, not on grammar. Major dictionaries list both forms and label them by region.
When “catalog” is the natural choice
Catalog is the natural choice when your readers are mainly American. This includes US companies, US colleges, US libraries, and software interfaces set to American English.
“Download our spring catalog” sounds completely natural to a US reader.
When “catalogue” is the natural choice
Catalogue is the natural choice for readers in the UK, Ireland, Australia, New Zealand, and many other English-speaking countries. Canadian writers use both forms, so check the style guide of your publication or employer.
“Browse our online catalogue” sounds natural in London or Sydney.
Cataloged vs Catalogued: Which Is Correct?
Both are correct. The same regional rule applies to the past tense.
American English: cataloged
Americans usually write cataloged.
- “The librarian cataloged the new arrivals.”
- “All items were cataloged before the sale.”
You may still see catalogued in American writing, but cataloged is the more common choice.
British English: catalogued
British writers use catalogued.
- “The team catalogued every specimen.”
- “Her work was catalogued in 1998.”
Also, read this: Nonresponsive vs Unresponsive
Cataloging vs Cataloguing
The -ing form follows the same pattern.
- American: “We are cataloging the donations.”
- British: “We are cataloguing the donations.”
The same goes for the person who does the work. Americans say cataloger, and British writers say cataloguer. In both spellings, the “ue” helps show that the “g” is hard, as in log, not soft, as in page.
How Do You Pronounce Catalog and Catalogue?
The two spellings sound the same. The “ue” in catalogue is silent.
- British: KAT-uh-log
- American: KAT-uh-lawg (some speakers say KAT-uh-lahg)
The stress falls on the first syllable in both spellings and in both the noun and the verb. Small differences come from accent, not from spelling.
Where Are Catalogs and Catalogues Used?
The word appears in many settings. In each one, catalog or catalogue follows the same regional rule. Only the examples change.
Product Catalogs
A product catalog lists items a business sells, usually with photos, prices, and item numbers. Mail-order companies built their business on printed versions.
- “The new catalog features more than 200 products.” (US)
- “Our winter catalogue arrives in October.” (UK)
Library catalogs
A library catalog shows what a library holds and where to find it. Older libraries used a card catalog, which was a set of drawers full of index cards. Today most libraries use an online system, often called an OPAC (online public access catalog).
- “Search the library catalog by title or author.” (US)
- “Check the library catalogue before you buy the book.” (UK)
Course catalogs
In the United States, colleges publish a course catalog that lists classes, requirements, and policies. British universities more often use words like prospectus or course guide, though course catalogue does appear.
- “Check the course catalog for prerequisites.”
Museum and exhibition catalogues
Museums and galleries publish catalogues that describe the works in a show. Writers of art books often use the spelling catalogue even in the United States. The phrase catalogue raisonné, which means a complete scholarly list of an artist’s works, keeps its French spelling in almost all writing.
- “The exhibition catalogue includes essays by three curators.”
Digital catalogs
Online shops, streaming services, and databases all use catalogs. A shop may keep a product catalog in a spreadsheet or database. A streaming service has a catalog of films and series.
- “The retailer updated its online catalog overnight.” (US)
- “The label’s back catalogue is now on streaming.” (UK)
Some technical systems use catalog as a fixed term in code or software names, even when the surrounding text is British English.
Can “Catalog” or “Catalogue” Mean a Long List?
Yes. Beyond actual lists, both words can describe a long series of things. A figurative list works the same way with catalog or catalogue, and writers often use it for problems or complaints.
- “The report is a catalog of missed deadlines.” (US)
- “His speech was a catalogue of complaints.” (UK)
This sense suggests a long, detailed list. It is not about a real document.
Why Does One Word Have Two Spellings?
The word comes from the Greek katalogos, meaning a list or register. It passed through Late Latin and Old French before entering English as catalogue. The French-style ending came along with it.
American English later simplified many spellings, and catalog became the common American form. This simplification was not consistent. Americans still write dialogue in most contexts but often write analog in technical ones. The split between catalog or catalogue is one of several pairs like this. Others include program/programme and analog/analogue.
What Is a Catalogue Example?
A catalogue is any organized list of items. These examples show how it appears in different settings:
- Retail: “Flip through the catalogue and mark what you like.”
- Library: “The book is listed in the library catalogue.”
- Art: “The exhibition catalogue has a full list of works.”
- Education: “The course catalogue shows the credit hours.”
- Music: “The band’s back catalogue is huge.”
Each example is a list of things that someone can browse or search.
Is “Catalogue” More Formal Than “Catalog”?
No. The difference between catalog or catalogue is regional, not a difference in formality. Dictionaries do not label catalog as informal.
Some people feel catalogue looks more traditional because it is longer. Others feel catalog looks more modern because it is shorter. Those are impressions, not rules. Formality comes from your wording and tone, not from the spelling of this word.
Which Spelling Should You Use?
Start with your audience. When you are unsure about catalog or catalogue, ask who will read your writing and where they live.
Choose “catalog” if you are writing for:
- American readers
- US schools, colleges, and libraries
- US businesses and online stores
- Software or web pages set to American English
- Publications that follow American style guides
Choose “catalogue” if you are writing for:
- British readers
- Australian, New Zealand, or Irish readers
- UK schools, universities, and libraries
- Museums and galleries that follow British style
- Publications that follow British style guides
What about an international audience?
Pick the spelling that matches your largest group of readers. Then use it everywhere in the same document or website. Do not switch back and forth.
Setting the page language to the right variant (for example, en-US or en-GB) helps tools such as spellcheckers and screen readers. If your audience is truly split, you can also create separate regional versions of a page.
Catalog or Catalogue for SEO: Does It Matter?
It matters less than many people think. Readers search for both catalog or catalogue, and search engines generally understand that they are spelling variants. Results can still differ by country.
A practical approach:
- Choose the spelling your readers use.
- Keep it consistent in your title, headings, and body text.
- Mention the other spelling once if it helps explain the difference, as this article does.
I can’t promise how a spelling choice will affect rankings. Writing clearly for your audience is the safest approach.
Common Catalog and Catalogue Combinations
| American | British | Meaning |
| product catalog | product catalogue | A list of items for sale |
| online catalog | online catalogue | A searchable list on a website |
| library catalog | library catalogue | A list of a library’s holdings |
| card catalog | card catalogue | Index-card system for books |
| course catalog | course catalogue | A list of classes |
| catalog number | catalogue number | A reference code for an item |
| back catalog | back catalogue | An artist’s older releases |
| mail-order catalog | mail-order catalogue | A printed product list |
| (catalogue raisonné) | catalogue raisonné | A complete list of an artist’s works |
Common Mistakes to Avoid
Most errors with catalog or catalogue come from treating one form as a mistake. Here are the five most common.
1. Calling “catalogue” incorrect
Incorrect: “Catalogue is a misspelling of catalog.”
Correct: “Catalogue is the British spelling of catalog.”
Why: Catalogue is the older spelling, and it is standard outside the United States.
2. Calling “catalog” informal
Incorrect: “Catalog is just a casual version of catalogue.”
Correct: “Catalog is the standard American spelling.”
Why: Dictionaries list it as a normal, correct spelling.
3. Mixing regional forms without a reason
Incorrect: “Our catalogue lists everything we cataloged last year.”
Correct: “Our catalogue lists everything we catalogued last year.”
Why: The noun and verb should follow the same regional style in one text. A deliberate exception is a proper name, such as a title you are quoting.
4. Assuming the spelling changes the meaning
Incorrect: “A catalogue is for products, and a catalog is for libraries.”
Correct: “Both spellings can describe product lists or library lists.”
Why: The meaning stays the same. Only the regional spelling changes.
5. Assuming online content must use “catalog”
Incorrect: “Websites must use catalog.”
Correct: “A UK website should use catalogue, and a US website should use catalog.”
Why: The internet does not set the spelling. Your audience does. Technical terms in code are the only exception.
Catalog or Catalogue: Quick Decision Guide
| If your reader is… | Use… |
| American | catalog (cataloged, cataloging) |
| British, Irish, Australian, or New Zealander | catalogue (catalogued, cataloguing) |
| Canadian | Follow your style guide; both are used |
| Mixed or global | Choose your largest group and stay consistent |
Quick checklist:
- Identify your main audience.
- Match the noun and verb forms.
- Stay consistent throughout.
- Keep original spellings in names and quotations.
Conclusion
Catalog or catalogue is a spelling difference, not a grammar error. Use catalog for American readers and catalogue for British, Australian, and most other international readers. The meaning, the pronunciation, and the grammar stay the same.
Next time you wonder about catalog or catalogue, check your audience first, then match the verb forms: cataloged and cataloging, or catalogued and cataloguing. Whichever you choose, keep it consistent.
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