Gather all ingredients. Preheat the oven to 375 degrees F (190 degrees C). Line two cookie sheets with parchment paper or silicone liners.

Beat butter, white sugar, and brown sugar in a large bowl until smooth and creamy. Beat in 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 teaspoonfuls of batter 2 inches apart onto the prepared cookie sheets.

Bake in the preheated oven until golden brown, 8 to 10 minutes, switching racks halfway through.

Remove from the oven and let sit on the cookie sheets for 1 to 2 minutes before transferring cookies to a wire rack to cool completely.