- Most of our data is sourced from the VoteAmerica Election API. VoteAmerica is a nonprofit organization providing access to trusted election information.
- We maintain a supplementary Airtable database that includes our “best guess” dates for when to expect to ballots in the mail, along with county-specific rules in states where they matter. We’re doing our best to provide you with the most accurate and localized information possible.
Beyond official state and county websites, we found these national mail-in voting guides helpful:
Want to help? Have a correction?
We’re seeking volunteers in each state to help us validate and keep our data up to date. And we certainly want to know if you see something off. Message @postyourvote on Twitter.