This feud escalated and there was a breakdown of the law, with roaming gangs and a "pitched battle" at the courthouse square in Blountstown.

The violence got so bad that the county judge had to call in aid from the Fifth Florida Militia Regiment, which deployed 150 militiamen to breakup the outlaw bands.

[5] The relative lawlessness continued during the American Civil War when armed gangs gathered in the country side and avoided conscription by the Confederacy.

These groups were in contact with and armed by the Federal blockade and even concocted a plan to kidnap the Confederate Governor Milton.

Among the unincorporated settlements are Broad Branch, Chipola, Clarksville, Chason, Durham, Fisher Corner, Flowers Still, Henderson Mill, Kinard, Leonards, New Hope, Rollins Corner, Selman, Sharptown, Summerville, and Willis.

[10][11] As of the 2020 United States census, there were 13,648 people, 4,510 households, and 2,753 families residing in the county.

According to the Secretary of State's office, Republicans hold a narrow majority among registered voters in Calhoun County as of 2022.

Like most of the Florida Panhandle, Calhoun County votes heavily Republican in presidential and congressional races yet still occasionally supports conservative Democrats in local and state contests.

Branches are located in the following communities and offer public computers with internet access, free wi-fi, programming for all ages, downloadable e-books and e-audiobooks, and numerous online databases and resources.