Preheat oven to 375F.
In a large bowl, cream together butter, white sugar, and brown sugar until smooth. Beat in the eggs and vanilla until fluffy. Stir together flour, baking soda, cinnamon, and salt. Gradually beat into the butter mixture. Stir in oats and raisins. Drop by teaspoonfuls onto ungreased cookie sheets.
Bake 8 to 10 minutes or until golden brown. Cool slightly, remove from sheet to wire rack to cool completely.