It should came as no great shock that the vast majority of country music singers do not write their own songs. If you didn't... well... just don't read the inside of the cd jacket. A lot of artists get "credited" as helping write songs, but, as a general blanket statement they usually have little to no input on what they put out. This explains why most of the songs you hear sound exactly alike... it's because the same song writers are writing songs for multiple artists. (Do yourself a favor and google the Peach Pickers)
Now don't get me wrong, I am not knocking this practice. Most artists start out writing their own songs and buy songs later on in their career when they're more established. They still have to have the chops , skills, and charisma to sell records. They still have to go out and perform and play music. After all, what is the point of a great song if you don't have a super star to deliver it and sell it?
Below is a list that I have comprised of songs that you've probably heard, but, had no idea someone that you have heard OF actually wrote it.
(By the way they're in no particular order)