[4] Sac City was first platted in 1855 by Joshua Keith Powell of Fort Dodge, Iowa.

The town was so named because the Sac and Meskwaki peoples[nb 1] were in possession of the land at the time of the Louisiana Purchase.

Judge Eugene Criss, credited with being the father of Sac City, left Wisconsin and crossed the Mississippi River in the early months of 1855 by covered wagon.

Deciding upon the North Raccoon River to begin his settlement, Judge Criss proceeded to erect the first log cabin in Sac City, establish himself in the hotel business, as well as keep a stage station and general store for nearby settlers.

The railroad companies refused to lay tracks through undeveloped or mildly developed areas, and Sac City did not meet the requirements.

The railroad companies demanded communities be far enough advanced to provide a quick return to capital before they would construct a steam and iron highway through the area.

The Chicago and North Western Transportation Company connected Sac City, Wall Lake, Auburn, Odebolt, Lake View, Early, and Schaller as well as the cities where crops were sold.

The fair was one of the biggest events of the year and brought people in wagons and buggies from miles around to see the harness races, livestock exhibits, produce, needlework, and art goods.

The Association brought many fine programs to the community, and because transportation was still slow and laborious, many families stayed in tents on the grounds for the entire Chautauqua session, about eight or nine days.

[9] Humid continental climate is a climatic region typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters.

The racial makeup of the city was 98.3% White, 0.1% African American, 0.2% Asian, and 1.3% from two or more races.

Sac City was home to a previous world's largest popcorn ball, which weighed 3,100 pounds and was housed in its own building.

[18] On June 18, 2016, volunteers assembled another possible record breaking ball weighing in at 9,370 pounds, now displayed in a new pavilion as a roadside attraction.

[19] The Sac City Municipal Airport (ICAO: KSKI) is located approximately 2.5 miles (4.0 km) south of the central business district.

The hospital began a US$10 million construction and renovation project to address changing health care needs, and prepare for future growth.

[20] The city is served by the East Sac County Community School District.