Birney has yet to put a famous person on the list
Missoula has the most of any town in Montana: 70. After Missoula, the next longest list in Montana is Billings’, with 65. 93 towns in Montana have at least one famous person on record.
Who’s listed here
Famous people come from Wikidata (people whose birthplace is Birney), checked against each person’s English Wikipedia article and ranked by how many Wikipedia languages cover them. Nobody born in Birney has passed that check yet, and nobody born within 35 miles is listed.
From Wikidata and Wikipedia: people whose birthplace is Birney 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.