What are all those barcodes on your King County ballot? The barcodes are to help the elections department and the voter track their ballot from start to finish. Author: KING 5 Staff Updated: 4:54 PM PDT July 12, 2021 If you received your King County ballot, you may have noticed there are several barcodes on the original and return envelopes. So, what are they for? Some KING 5 viewers have asked if any of the barcodes are to identify a voter's party affiliation. A King County Elections spokesperson said none of the barcodes have anything to do with party affiliation. They do have everything to do with helping the elections department and the voter track their ballot.