20 lb Turkey Cook Time
Direct Answer: A 20 pound turkey typically takes approximately 4 hr 30 min to 5 hr to roast in a 325°F oven if unstuffed, and 4 hr 45 min to 5 hr 15 min if stuffed. Always verify it has reached a safe internal temperature of 165°F.
When to start checking: We recommend inserting your meat thermometer into the thickest part of the thigh after 3 hr 49 min of cooking time. If the skin is getting too brown, you can tent it with foil at this point.
Roasting Time (Unstuffed)
4 hr 30 min – 5 hr
At 325°F. Target 165°F internal.
Roasting Time (Stuffed)
4 hr 45 min – 5 hr 15 min
At 325°F. Stuffing must reach 165°F.
Refrigerator Thaw Time
4 days 4 hr
Or 10 hours in cold water.
Serves
14 – 20 people
Based on 1.0–1.5 lbs per person.
Example Timeline for 3:00 PM Dinner
If you want to serve your unstuffed 20 lb turkey at 3:00 PM, here is a suggested schedule:
Preheat to 325°F
4 hr 30 min–5 hr estimated
Check every 15–20 min. Target: 165°F
When internal temp reaches 165°F
20–45 min — let juices redistribute
Time to eat!