1. In 1864, the Idaho Territory held its first state election on October 19. William H. Wallace became the first governor of Idaho.

2. In 1912, the University of Idaho dedicated its new Administration Building, now known as the Administration Building, on October 19. The building is listed on the National Registrar of Historic Places and still serves as the administrative hub for the university.

3. In 1930, a magnitude 6.1 earthquake struck the town of Challis, Idaho, on October 19. The quake destroyed much of the town and killed 11 people.

4. In 1977, Idaho Senator Frank Church delivered a speech at Harvard University in which he called for greater transparency and accountability in government intelligence agencies like the CIA. The speech, delivered on October 19, became known as the "Church Committee Report" and sparked significant reforms in the intelligence community.

5. In 2012, a young girl named Sierra Dawn Measel went missing in the small town of New Meadows, Idaho, on October 19. The community rallied together to search for the girl, who was eventually found alive and well after spending two days lost in the woods.