 pioneer is a city in humboldt county, iowa, united states. the population was 23 at the 2010 census. ==geography== pioneer is located at  (42.654422, -94.390775). according to the united states census bureau, the city has a total area of , all of it land. ==demographics== {{historical populations |title = historical populations |type = usa |align = left |1910| 92 |1920| 84 |1930| 98 |1940| 129 |1950| 83 |1960| 76 |1970| 
Cities_in_Humboldt_County,_Iowa Cities_in_Iowa