 clarence is a city in cedar county, iowa, united states. the population was 974 at the 2010 census. == history == the community was originally called "onion grove" because of the widespread growth of wild onions along mill creek. the village was moved in order to be close to a railroad line and the name was changed to "clarence" on the suggestion of clarence, new york native l. b. gere. clarence was incorporated in 1866.{{cite book | url=http://books.google.com/books?id=l4quaaaayaaj&pg=pa141#v=onepage&q&f=false | title=a topical histor
Cities_in_Cedar_County,_Iowa Cities_in_Iowa