Santa's Letters, Inc. Non-Profit Organizations Santa's Letters, Inc. Visit Website Request Info 2 Windward Way Dagsboro, DE 19939 (302) 500-2249 About Map About Santa's Letters, Inc. is a 501(c)(3) non-profit charitable organization dedicated to helping local Sussex County families have a memorable Christmas and holiday season. What's Nearby? Distance: 5 10 15 20 25 50 mi.