In a large bowl, cream together the butter, white sugar, and brown sugar until smooth. Beat in the eggs one at a time, then stir in the vanilla.
Combine flour, baking soda, cinnamon, and salt; stir into the creamed mixture until just blended. Mix in oats and raisins. Drop by rounded teaspoonfuls onto ungreased baking sheets.
Bake for 8 to 10 minutes in the preheated oven. Allow cookies to cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Notes:
Store in an airtight container to keep them fresh.