Attention Duarte Residents: This holiday season don't forget to drop off your letter to Santa! Santa's Mailbox for Duarte is located inside Duarte City Hall (1600 Huntington Drive) during normal business hours (M - Th, 7:30 AM to 6 PM). This special opportunity is for youth ages 10 and under. Be sure to include your address on your letter as Santa replies to all youth that reside within the City of Duarte boundaries.