I’ve been asked this question a few times. How many links does Google crawl on a single page? After doing a bit of research I’ve come up with two conclusions. First from a technical Google Bot Crawl point of view and secondly site usability.
As a general rule of thumb, many SEO practitioners try to keep the URL count on a single page to under 100. This stems from the Google Webmaster Guidelines in which it states “Keep the links on a given page to a reasonable number”.
Matt Cutts once explained that Google used to index on average the first 100k of a page. These days search engines indexes more than 100k but it still raises some points.. If you have over 100 links on a page, how are these links displayed? Is it in a way so that the user can still successfully browse through your site without feeling overwhelmed?
This is where you look at your website from a usability point of view. If it makes sense to have over 100 links then by all means go for it – just as long has you have plenty of quality content to go with it and that the amount of links will not confuse or put visitors off your website. Google will not automatically penalise you for having over 100 links just as long as the contents and links follow their quality guidelines.

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