In Montana, 31% of 18-year-olds are registered to vote, compared to 83% of voters 45+
Teens have the power to close the gap.
Learn MoreMontana Voter Registration Gap
This maps shows the most recent county-level voter registration rates in Montana, one of a set of 39 states we currently track. Rates are shown for both 18-year-olds and adults ages 45 and older. Click a county to learn more about voter registration in there.
Montana
31% of 18-year-olds are registered to vote as of May 19, 2026.
Learn more about this information.
High school communities can close the gap in Montana.
Student-led, non-partisan voter registration drives in school ensure every student has the chance to get ready to vote before they graduate.
Montana County Registration Rates
This table shows the voter registration rates in each Montana county or county-equivalent as of May 19, 2026. We omit counties with 18-year-old populations below 100.
See our methods for more details.
| 18 vs 45+ | |||||
|---|---|---|---|---|---|
| Beaverhead County | 15% | 83% | 141 | 9,713 | |
| Big Horn County | 21% | 76% | 198 | 12,891 | |
| Broadwater County | 34% | 83% | 118 | 7,668 | |
| Carbon County | 50% | 87% | 110 | 11,116 | |
| Cascade County | 32% | 74% | 822 | 84,606 | |
| Custer County | 25% | 70% | 138 | 11,961 | |
| Flathead County | 41% | 83% | 1,029 | 110,695 | |
| Gallatin County | 23% | 90% | 2,419 | 124,074 | |
| Glacier County | 27% | 76% | 183 | 13,637 | |
| Hill County | 22% | 73% | 260 | 16,155 | |
| Jefferson County | 55% | > 90% | 104 | 12,774 | |
| Lake County | 39% | 78% | 279 | 32,561 | |
| Lewis and Clark County | 34% | 86% | 824 | 73,464 | |
| Lincoln County | 50% | 81% | 132 | 21,175 | |
| Madison County | 32% | > 90% | 136 | 9,223 | |
| Missoula County | 27% | 89% | 1,809 | 120,672 | |
| Park County | 35% | 88% | 144 | 17,710 | |
| Ravalli County | 46% | 87% | 413 | 46,727 | |
| Richland County | 19% | 83% | 167 | 11,235 | |
| Roosevelt County | 20% | 81% | 191 | 10,526 | |
| Rosebud County | 26% | 84% | 101 | 8,165 | |
| Sanders County | 23% | 83% | 238 | 13,285 | |
| Silver Bow County | 26% | 78% | 511 | 35,785 | |
| Valley County | 24% | 80% | 101 | 7,519 | |
| Yellowstone County | 34% | 81% | 1,822 | 168,957 |
Your Donations Fuel Our Mission
Your gift powers non-partisan preregistration drives in communities across the country. Every donation builds momentum, funds local efforts, and helps more young people get ready to vote. Support us today — and spread the word!
The Civics Center is a project of Community Partners, a 501(c)(3) organization.
Partner
with Us
We partner with school districts and nonpartisan organizations serving high school students and educators;
Are you passionate about democracy and helping young people thrive?
About this information
The voter data shown on this page comes from a commercial source that compiles official state records and was last updated on Jul 14, 2026. Population estimates come from the American Community Survey. To learn more, read our research model.
These pages are offered for guidance only and are not intended as legal advice. Please consult state election officials or an attorney if you have questions about any particular situation. We hope you find this useful. To cite our resources and original research, please provide links and/or cite The Civics Center.
If you have a question or noticed a discrepancy, please contact us.
© 2026 The Civics Center
