Results! The longest word that Twitter search will find is 17 characters, so the longest hashtag is 16 (plus the #).
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Results! The longest word that Twitter search will find is 17 characters, so the longest hashtag is 16 (plus the #).