This county was named after Daniel Webster, an American statesman noted for his moving oratory.

Webster County comprises the Fort Dodge, IA Micropolitan Statistical Area.

There were 16,969 housing units at an average density of 24 per square mile (9.3/km2).

The racial makeup of the county was 93.39% White, 3.39% Black or African American, 0.30% Native American, 0.66% Asian, 0.02% Pacific Islander, 1.10% from other races, and 1.15% from two or more races.

The population ranking of the following table is based on the 2020 census of Webster County.

[15] In 2020, Trump received a larger percentage of the county's vote (over 61%) than any presidential candidate since Lyndon Johnson in 1964.