Nashua, the â??Gate Cityâ??, is the second largest city in New Hampshire and is the center of a diverse and dynamic region of more than 175,000 people. The combination of an excellent quality of life and proximity to the White Mountains, the seacoast, and Boston makes Nashua an attractive growth center for New England. We are committed to supporting a climate for families to thrive, children to learn, businesses to succeed, and visitors to stay.