The best place to donate an artificial Christmas tree would be to a local charity or organization that serves those in need. Look for a charity that accepts donations of used furniture or household items, as they may be able to put your tree to good use. You can also check with local churches or homeless shelters to see if they have a need for Christmas decorations. If you're not sure where to donate, you can always post an ad online or on social media to see if anyone in your community is interested in taking it off your hands.