Result
Yes. "Where" is an adverb or a subordinating conjunction ("Where to Start," "Go Where the Readers Are"), and every style guide capitalizes it. At five letters, it clears even Bluebook's four-letter cutoff for conjunctions.
"Where" by Style Guide
| Style guide | "Where" mid-title | Why |
|---|---|---|
| AP | Capitalize | Adverbs are major words |
| APA | Capitalize | Adverbs are major words |
| Chicago | Capitalize | Adverbs are major words |
| MLA | Capitalize | Adverbs are major words |
| AMA | Capitalize | Adverbs are major words |
| Bluebook | Capitalize | Adverbs are major words |
Examples in Chicago Style
- Where to Start a Blog
- Go Where Your Readers Are
- Where the Wild Things Are
- Where Do We Go from Here
"When" is the related word to watch: at four letters, Bluebook lowercases it when it works as a conjunction.
For the short list of words that do stay lowercase, see the full list of words that stay lowercase.
"Where" in Sentence Case
APA reference lists, many news sites, and most UI text use sentence case instead of title case. There, only the first word and proper nouns get capitals, so "where" is lowercase unless it starts the title: "Where to start a blog." Pick one of the two styles for a whole set of headings rather than mixing them.
Quick Answers
Should "where" be capitalized in a title?
Yes. "Where" is an adverb, and every style guide capitalizes adverbs in title case.
Is "where" capitalized in APA?
Yes. APA capitalizes major words, including adverbs, regardless of length.