The Frequency list of 6000 most common Korean words compiled by National Institute of Korean language is already available on TOPIK GUIDE in 6 parts – First Part, Second Part,Third Part, Fourth Part, Fifth Part and Sixth Part.
You can also access the complete list on a single webpage in plain text form. It can be useful for printing purposes. This html list is from ezcorean.com. One plus point with this list is that it also has the difficulty levels of the words as A, B and C in the second column. A means the basic and most common words, B the intermediate level words and C represents advanced level words. You can ignore the first and third columns. Hope you find it useful. Go to THE LIST.