The word "constituent" refers to a person or thing that is a part of a larger whole or group. It can also mean voters who live in a specific area that elect a representative. Full definition
A spokesman for the Democratic mayoral nominee said he was acting as an elected official responding to the needs of constituents in both instances. (nypost.com)
In your campaign, you promised to make the city budget work better for constituents. (dnainfo.com)
During the last Congressional recess, he refused to hold town halls, saying that he felt it was more fruitful to meet with constituents in small groups. (hudsonvalleyone.com)