If you’re looking for traditional hymns for use in your Thanksgiving worship, here’s a list from Cyberhymnal. Click on each link to see the text and listen to the music.
For other song suggestions for Thanksgiving, see these other blog posts:
Traditional Hymns for Thanksgiving
7. Give Thanks
20. King of Kings
26. Now Our God
40. Thankfulness
41. Thanks to God
Also consider "For the Beauty of the Earth."
For other creative worship resources for Thanksgiving Sunday or Harvest celebrations, click on Thanksgiving Sunday in the list of “Labels” at the lower right side of the page, or see this Thanksgiving Day Resources index.