How many letters does the top answer for “a person from san marino” have?

The most common answer is sammarinese (11 letters).

Crossword clue: a person from san marino

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

sammarinese 11 letters wd-fact-v3

capital of san marino 50% similar → sanmarino

city in san marino 50% similar → sanmarino

landmark in san marino 50% similar → palazzopubblico

mountain in san marino 50% similar → montetitano