Two libraries that are using Instagram in their marketing of plan.

Tinley Public Library
http://www.tplibrary.org/events/instagram-photo-contest-5

This library used Instagram for an "In Love with Reading" contest. People posted photos that promoted the contest them and the winner won a $25 Starbucks gift card.

Onondaga County Public Library Local History & Genealogy Department
http://instagram.com/lhg_ocpl#

OCPL posts photos of old maps, family photographs, and other documents related to their area's local history.