An orphan page is a page on a website that has no internal links pointing to it from anywhere else on the site, making it hard for both visitors and search engine crawlers to discover through normal navigation.
A page can still technically exist and even be indexed — if it was submitted via a sitemap, or once had links that were later removed — while having zero internal links pointing to it in the site's current structure. Without any internal pathway leading a crawler or visitor to it, it's effectively isolated from the rest of the site. Orphan pages commonly happen after a site redesign or content migration where old pages are technically kept live but the navigation and internal links connecting to them are rebuilt without including them, or when a page is created directly (via a CMS) without anyone adding a link to it from elsewhere on the site. Even if an orphan page is indexed via a sitemap, it misses out on the internal linking signals (relevance context, some ranking-adjacent value) that pages reached through a site's normal link structure typically accumulate.
An orphan page represents a genuine missed opportunity — content that exists and may even rank, but is contributing less than it could to the site's overall structure and discoverability simply because nothing links to it internally.
Yes, if it was discovered another way — through a submitted sitemap, an external backlink, or before its internal links were removed. Being an orphan is about internal linking specifically, not indexing status.
Comparing a full list of your site's URLs (from your sitemap or CMS) against the pages your internal linking actually reaches by crawling from your homepage is the standard way to spot the difference — any URL that exists but is never reached through internal links is an orphan.
Add at least one relevant internal link to it from an appropriate existing page — ideally more than one, from pages where it's genuinely relevant to the reader, not just for the sake of adding a link.
No credit card required. See real output for your own business before you pay anything.