Lindon is an unincorporated community and a U.S. Post Office located in Washington County, Colorado, United States. The Lindon Post Office has the ZIP Code 80740.Lindon is located at 39°44′13″N 103°24′20″W / 39.73694°N 103.40556°W / 39.73694; -103.40556. Lindon's previous names included Linden and Harrisburg.