Tweeting with your location is disabled by default for everyone. You must enable this feature to add location data to your Tweets.
On the web:
On Twitter for iOS:
On Twitter for Android:
(For browsers supporting HTML5 and geolocation.)
After you've enabled Tweet location in your settings, you'll see a location field below the "What's happening?" box on your homepage.
If you have already enabled tweeting with your location, you can disable it the same way you enabled it:
Making this change only alters your settings going forward. To remove your location data from all of your previous Tweets, you’ll need to delete all location information. Here's how:
Check out our Tweet & DM Troubleshooting section for solutions to common problems.