1. Iowa Became a State on December 28, 1846:
Although it wasn't on July 4th, Iowa officially became a state on December 28, 1846, making it the 29th state in the United States.

2. The Territorial Capitol of Iowa Burned Down in 1857:
On the morning of July 4th, 1857, the Territorial Capitol of Iowa, located in Iowa City, burned down in a massive fire. The cause of the fire is still unknown, but it destroyed the entire building and all of its contents.

3. Dubuque Celebrated the Centennial of the American Flag in 1877:
On July 4th, 1877, Dubuque celebrated the centennial of the American flag in a grand manner. The city hosted a parade, fireworks, and numerous other festivities to commemorate the 100th anniversary of the flag.

4. Iowa Celebrated Its Centennial in 1946:
On July 4th, 1946, Iowa celebrated its centennial with a variety of events, including parades, fireworks, and historical reenactments. The state also released a commemorative centennial stamp and held a special session of the Iowa General Assembly.

5. The Iowa State Fair Always Falls Near July 4th:
The Iowa State Fair, one of the largest and most popular state fairs in the country, always falls near the July 4th holiday. The fair typically runs for 11 days starting in mid-August, but its proximity to the holiday makes it an important part of Iowa's summer festivities.