What is the Maximum Length of a Data Column Name? Joe Vetoe Updated July 21, 2017 14:52 Follow Form Builder Common Questions Data column names have a maximum character length of 65. Related articles Reserved Words: What words cannot be used as data column names? How do I search through my forms? (Form Builder 2.0) Record IDs Record API (5.1) How do I keep a running total of a subform element? Comments 0 comments Please sign in to leave a comment.