"Today we're opening Threads to more European countries," wrote Zuckerberg in a post on the platform.
The move comes five months after the social media network launched in most markets worldwide, but remained unavailable to EU-based users due to regulatory hurdles.
In addition to creating a Threads profile for posting, users in the EU can browse Threads without having an Instagram account, an option likely introduced to comply with legislation surrounding online services.
The expansion into a market of 448 million people should see Threads' user numbers get a decent boost.
Meta CEO Mark Zuckerberg said on a company earnings call in October that Threads now has "just under" 100 million monthly users. Since its launch earlier this year, it has gained a web app, the ability to search for posts, and a post-editing feature.