Jefferson County Invites Public to Witness Voting Machine Accuracy Testing Ahead of May 19 Primary
Why It Matters
With Idaho’s primary election just days away, Jefferson County is taking steps to build public confidence in its election process by opening its voting machine testing to community members and local representatives. The county’s move toward greater transparency comes as election integrity remains a top concern for voters across the state.
What Happened
Jefferson County held a public logic and accuracy demonstration Wednesday morning in Rigby, giving local representatives and media an opportunity to observe how the county’s 21 newly acquired DS300 voting machines handle both valid and erroneous ballots.
County Election Administrator Cathy DaBell explained that this primary cycle marks the first time Jefferson County has used these machines. The demonstration involved submitting test ballots — representing Republican, Democratic, Libertarian, and Constitution party voters, along with several ballots containing intentional errors — to verify that each machine counted accurately.
After test ballots were fed into the machine, workers removed them and tallied the results by hand, cross-referencing the manual count against the machine’s recorded totals to confirm accuracy.
“We have been testing, probably for the last two weeks, on all of the machines to make sure that they’re reading correctly,” DaBell said. “Then we actually have the precinct workers come in, and they actually test as well, so to verify for their precinct.”
Representatives from the county clerk’s office and both the Republican and Democratic parties participated in the demonstration process.
A New Counting System
Beyond the new hardware, Jefferson County is also changing how it tallies results. The county has shifted away from a centralized vote count — where all ballots were processed at a single location — to a precinct-level count, where votes are tabulated locally before being combined countywide.
Each of the county’s 21 precincts will receive one DS300 machine, ready for use when polls open on May 19. A full list of precinct locations is available on the county’s official website. Voters can also find polling information at voteIdaho.gov.
Built-In Voter Alerts
The DS300 machines include an alert feature designed to catch common ballot mistakes before they become final. If a voter submits a ballot without selecting a candidate in a race — an undervote — or selects more than one candidate in a single-choice race — an overvote — the machine will flag the issue and prompt the voter to review their choices before the ballot is officially cast.
“Once the ballots are actually inserted, we don’t touch the ballots after that,” DaBell said. “So, once the voter puts the ballot in, there should be no need to sort those out.”
By the Numbers
- 21 new DS300 voting machines deployed across Jefferson County
- 21 precincts countywide, each receiving one machine
- 2 weeks of ongoing logic and accuracy testing before the public demonstration
- May 19 — Idaho Primary Election Day
Community Response
Jefferson County Veteran Service Officer Amy Johnson praised both the thoroughness of the testing process and the clerk’s office for keeping the public informed throughout. She noted that in past elections, hand-counting ballots could stretch into the early morning hours.
“It’s saving time, and it’s saving county dollars of not having to pay those people to sit there to do that counting,” Johnson said.
Zoom Out
Jefferson County’s push for public transparency in its election infrastructure reflects a broader trend in Idaho and across the Mountain West, where county officials have faced growing pressure from constituents to demonstrate that voting systems are secure and accurately calibrated. Idaho’s May 19 primary is already generating significant political energy, with contested races drawing considerable attention from voters statewide. Election integrity measures like logic and accuracy testing have become a standard expectation in many Idaho counties ahead of high-turnout elections.
What’s Next
Precinct workers will conduct their own independent verification of the machines before Election Day. The 21 DS300 machines are scheduled to be deployed to their respective precincts in time for polls to open on May 19. Jefferson County voters are encouraged to check the county website for their assigned polling location.
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