Portland has no famous person on record yet
The Iowa lists hold names for 504 towns. The longest list of any town in Iowa belongs to Waterloo, with 61. Iowa City has the second-longest list in Iowa, after Waterloo, with 54.
Who’s listed here
Famous people come from Wikidata (people whose birthplace is Portland), checked against each person’s English Wikipedia article and ranked by how many Wikipedia languages cover them. Nobody born in Portland has passed that check yet, and nobody born within 35 miles is listed.
From Wikidata and Wikipedia: people whose birthplace is Portland and whose English Wikipedia article agrees, ranked by how many Wikipedia languages cover each person. People known mainly for crimes, and adult performers, aren’t listed. “The usual town” = everyone born in the towns gathered so far.