How Long To Cook 1 Pound Pork Tenderloin In Oven At 375. Preheat the oven to 375 degrees f (190 degrees c). Per pound, roast for 30 to 35 minutes.
Remove it from the oven when done. If you are looking for something with a bit more flavor, consider marinating the pork before putting it in the oven. Cover pork tenderloin with dry rub (optional) or season for more flavor.