How do I remove GarageBand?

I'm nearly out of space and ~/Library/Application Support/GarageBand is taking up 1.5 GB and GarageBand.app is taking up 381 MB of my hard disk space.

Can I simply remove the app itself and this folder to remove it from my system?

Yup, if you no longer want it on your system, those are the two biggest offenders in terms of size. To be completely thorough, have a look through ~/Library/Preferences/ for the .plist file and trash that too.

If you're on a purge, it may be worth looking at iMovie/iDVD too if you don't use those.

Yes, you can remove /Applications/GarageBand.app and ~/Library/Application Support/GarageBand from your system. In case you are wondering if other files related to GarageBand are remaining, you can get a listing of all files installed by GarageBand by issuing the following command:

$ lsbom /Library/Receipts/boms/com.apple.pkg.GarageBand51.bom

lsbom provides access to the package receipt giving full details of what was installed and where.

Also check for preference .plist files in:

$ ls -l ~/Library/Preferences/*garage* 

Hope this helps.

If you are like me wanting to move GarageBand elsewhere such as a backup harddrive then

$ mkdir -p /Volumes/DEVELOPMENT/BACKUP/Library/Application\ Support/
$ mv ~/Library/Application\ Support/GarageBand/ /Volumes/DEVELOPMENT/BACKUP/Library/Application\ Support/
$ mkdir /Volumes/DEVELOPMENT/BACKUP/Applications/
$ mv /Applications/GarageBand.app /Volumes/DEVELOPMENT/BACKUP/Applications/

then if you want to get the Garageband back when you have a larger harddrive, you do the inverse

$ mv /Volumes/DEVELOPMENT/BACKUP/Library/Application\ Support/GarageBand/ ~/Library/Application\ Support/ 
$ mv /Volumes/DEVELOPMENT/BACKUP/Applications/GarageBand.app /Applications/

You need to run some commands as sudo like $ sudo mv....

Yup, no issues, one of the first things I did when I got my Mac.

There may be some plists stored elsewhere, but they will be small in comparison to all the instruments, songs and samples in the Application Support directory.