The famous person Stephen Harris Taft is associated with one of more of the Humboldt County historic places.
Some of the country's most noteable architects helped create the Humboldt County places including Clinton Bridge and Iron Works, Company Kramme E.A., Hallett & Rawson, Iowa State Highway Commission, G. L. Long and Rich and Woodburn Dougher. Prominent architectural styles found in Humboldt Country are Italianate, Late 19th And 20th Century Revivals and Late Victorian.