[4] Dyer immigrated from Banwell, England and established a hotel, The Clarendon, in 1857.

His sons, James Andrew Dyer with 6th Iowa Cavalry Regiment and Henry Andrew Dyer with 21st Iowa Infantry Regiment, served in the United States Civil War.

The 1989 movie Field of Dreams was filmed at a farm near Dyersville.

The ballpark, now named for the movie, hosted the Major League Baseball game between the Chicago White Sox and the New York Yankees (broadcast live as MLB at Field of Dreams) on August 12, 2021.

[5] The park hosted the second game in the series, between the Chicago Cubs and the Cincinnati Reds on August 11, 2022.

Hispanic or Latino persons of any race comprised 3.4% of the population.

At the 2010 census there were 4,058 people, 1,700 households, and 1,102 families living in the city.

At the 2000 census there were 4,035 people, 1,578 households, and 1,117 families living in the city.

About 4.6% of families and 4.8% of the population were below the poverty line, including 5.5% of those under the age of 18 and 8.4% of those 65 and older.

Dyersville, and all of Iowa, are represented by U.S. senators Chuck Grassley (R) and Joni Ernst (R).

Postal Service operates the Dyersville Post Office.

The current library was formally named after its benefactor on March 1, 2001 and broke ground on April 1, 2001.

[17] Dyersville is a thriving farming city with a long history.

It is also the longtime home of the Ertl Company, a maker of die-cast farm toys.

The nine largest employers (by number of employees) in descending order, as of 2016[update].