Sioux Rapids is a city in Buena Vista County, Iowa, United States.

[3] Two early surveyors, Lane and Ray, found the area so attractive for settlement that in 1855 they illegally laid a claim and built a cabin in section 12 of Barnes Township and over-wintered there.

He sold large amounts of this land, but after years of legal action, Lee and his purchasers lost all their claims in 1882 in a final case against them.

In 1870, after reversal of an earlier decision, Fuller was allowed to keep his land, in a protracted case finally decided by the US Secretary of the Interior.

[4] In 1868, Fletcher Americus Blake he built the first frame house in Sioux Rapids, and with T.W.

Twiford the first flour mill in the county, using the Little Sioux River for water power.

Blake was the first postmaster in Sioux Rapids and the first person from the county to be elected to the Iowa House, serving in the 1872 session.

In 1869 David Evans and lawyer D. C. Thomas bought out the Ridgeway homestead and the present town of Sioux Rapids was platted out.

In 1889 he sold his remaining town lots to buy a farm in Clay County near Linn Grove.

During the 50th anniversary for Sioux Rapids, on July 4, 1905, Evans rode together in the “Historic Parade” with his 89 year old, long time buddy, Johnny Burr, another ex-soldier pioneer hunter-trapper and faithful attendant at Abner Bell’s deathbed in 1895.

In 1876, the courthouse at Sioux Rapids burned, and in 1878, the county seat was transferred to Storm Lake.

According to the United States Census Bureau, the city has a total area of 0.82 square miles (2.12 km2), all land.

Sioux Rapids hosts its "Tall Corn Days" festival every year near the end of July.

In the past, this has included a parade, street dance, sweet corn feed, a 5k run/walk, a kids fire fight game, a lunch at the city park, and various sports tournaments.

Sioux Rapids also has an historical museum/theater, a swimming pool, an American Legion Post, a community center, and various local businesses.