Who does a member of the House of Representatives represent?

What does this answer mean?

A member of the House of Representatives represents the people in their congressional district. USCIS accepts several versions: citizens in their congressional district, citizens in their district, people from their congressional district, or people in their district.

House seats are divided among the states by population, and states with more than one seat are divided into districts, each electing one representative. After the 2020 Census, the average district had about 761,000 people. A state with only one seat has a single district that covers the whole state.

This is the main difference from senators. A senator represents everyone in the state, while a representative speaks for one part of it. That's why two people in the same state can have different representatives.

Because the answer to "Name your U.S. representative" depends on your district, you need your home address to find yours. For this question, at the interview, say "people in their district."