Bluebook Title Capitalization Rules

Bluebook title case is used for citing court cases, statutes, and legal documents. It follows a conservative title case similar to Chicago.

Where Bluebook Style Is Used

Bluebook title capitalization is the standard for Law, Legal Writing, Law Reviews, Court Documents writing. Following the correct style guide is important when submitting work for publication, academic review, or professional presentation in these fields.

Bluebook Capitalization Rules

• Capitalise all major words
• Lowercase: articles (a, an, the)
• Lowercase: coordinating conjunctions ≤4 letters
• Lowercase: prepositions ≤4 letters
• First and last word always capitalised

How Bluebook Style Works in Practice

Bluebook title case is defined by the Bluebook: A Uniform System of Citation, the dominant citation standard in US legal writing. It is used by law schools, law review journals, courts, and practicing attorneys for citing cases, statutes, regulations, and legal documents. Bluebook title case follows a preposition-length rule nearly identical to Chicago: prepositions of four letters or fewer are lowercase, while longer prepositions are capitalized. The style is applied to the titles of articles, books, and headings in legal writing, but note that case names follow a separate set of italicization and abbreviation rules specific to legal citation.

Common Edge Cases in Bluebook Style

• Case names (e.g., Roe v. Wade) follow their own Bluebook italicization rules, not standard title case.
• Statutes and acts retain their official capitalization as enacted, regardless of title case rules.
• "With" (4 letters) stays lowercase in Bluebook, matching Chicago.
• "About," "Between," "Through," "Without" (5+ letters) are capitalized, matching Chicago.
• Law review article headings typically use Bluebook title case for the main title and sentence case for section headings.

Example: Bluebook Title Case

To see Bluebook style applied to your own title with a word-by-word explanation of every rule, use the Bluebook title capitalizer. You can also compare all 9 styles side by side using the same title.

How Bluebook Differs From Chicago

Bluebook and Chicago produce nearly identical title case outputs because Bluebook's rules closely follow Chicago's 4-letter preposition threshold. Both capitalize prepositions of 5 or more letters and lowercase shorter ones. The main differences between the two systems appear in their citation formatting (Bluebook has extensive legal-specific rules for abbreviations, case names, and statutory references) rather than in the basic capitalization of titles and headings. For standard title capitalization purposes, the two styles are effectively interchangeable.

See the full comparison in the Chicago style guide or use the side-by-side comparison tool.

How Bluebook Differs From Other Styles

Every style guide makes different choices about prepositions, articles, and conjunctions. Here is how Bluebook compares to the other major title capitalization standards:

• APA — widely used in social sciences.
• Chicago — standard for books and publishing.
• AP — the standard for journalism and news.
• MLA — standard for literature and language.
• AMA — standard for medical and health writing.
• NY Times — used in one of the world's most read publications.
• Wikipedia — sentence case with proper nouns.
• Email — sentence case for professional communication.

Frequently Asked Questions

What is Bluebook title capitalization?

Bluebook title capitalization follows The Bluebook: A Uniform System of Citation, 21st Edition. Used for citing secondary sources in legal writing, it capitalizes principal words and lowercases articles, coordinating conjunctions, and short prepositions (four or fewer letters).

When should I use Bluebook title case?

Use Bluebook title case when writing legal briefs, law review articles, judicial opinions, or any legal citation that references secondary sources. It is the citation standard for US law schools, courts, and legal publications.

What words are capitalized in Bluebook titles?

Principal words — nouns, verbs, adjectives, adverbs — and prepositions of five or more letters are capitalized. The first and last word are always capitalized.

What words are lowercase in Bluebook title case?

Articles (a, an, the), coordinating conjunctions, and short prepositions of four or fewer letters (at, by, for, in, of, on, to, up, from, into, over, with) are lowercase in the middle of a Bluebook title.

Are articles capitalized in Bluebook title case?

No. Articles (a, an, the) are lowercase in the middle of a Bluebook title. They are capitalized only when they are the first or last word of the title.

Are conjunctions capitalized in Bluebook title case?

Coordinating conjunctions (and, but, or, nor, for, so, yet) are lowercase. Subordinating conjunctions are capitalized as principal words.

Are prepositions capitalized in Bluebook title case?

Short prepositions (four or fewer letters) are lowercase. Longer prepositions (five or more letters) like "About," "Among," "Between," and "Through" are capitalized. This is consistent with Chicago Manual of Style rules.

Is the first word always capitalized in Bluebook titles?

Yes. The first word is always capitalized regardless of part of speech.

Is the last word always capitalized in Bluebook titles?

Yes. The last word is always capitalized.

How is Bluebook title case different from other styles?

Bluebook is closest to Chicago: both lowercase short prepositions (≤4 letters) and capitalize longer ones. The primary difference is context — Bluebook is specifically designed for legal citations, while Chicago covers general publishing. APA differs significantly by lowercasing all prepositions.

Can I convert a title to Bluebook style automatically?

Yes. Use the Bluebook title capitalizer for instant conversion with a full explanation.

Can I compare Bluebook with APA, Chicago, and MLA?

Yes. The Compare Styles tool shows all 9 styles side by side.

Can I use TitleCasePro for Bluebook capitalization?

Yes. TitleCasePro follows Bluebook 21st Edition title case rules. Use the Title Capitalizer or Batch Capitalizer.

Use the Bluebook Capitalizer

Ready to capitalize a title in Bluebook style? The Bluebook title capitalizer converts your title instantly and explains every word. For processing a list of titles at once, use the batch capitalizer with CSV or TXT import. To see your title in all styles simultaneously, use the style comparison tool.

Read our guide on Bluebook title case rules for legal writing for a complete reference with examples.