Parnell is a city in northeast Nodaway County, Missouri, United States, near the Platte River. The population was 191 at the 2010 Census. It …Parnell is a city in northeast Nodaway County, Missouri, United States, near the Platte River. The population was 191 at the 2010 Census. It was home to the father-son horse trainers Ben and Jimmy Jones, whose horses won eight Kentucky Derbies and two Triple Crowns.
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