1903 Boston mayoral election

The Boston mayoral election of 1903 occurred on Tuesday, December 15, 1903. Democratic candidate and incumbent Mayor of Boston Patrick Collins defeated Republican candidate George N. Swallow, and two other contenders, to win a second term. Under legislation adopted in June 1903, this was the first Boston municipal election with "caucuses, henceforth to be called primaries", which were held on Thursday, November 19, 1903. Inaugural exercises were held on Monday, January 4, 1904.