American Government 101

The House of Representatives are a group of leaders within Congress, along with their counterparts in the Senate.  These individuals are often referred to as a congressman, congresswoman, or congressperson.  Each representative is elected to a two-year term and they are responsible to serve the people of a specific congressional district within their State. The number of voting representatives in the House is fixed by law at no more than 435. Currently, there are five delegates representing the District of Columbia, the Virgin Islands, Guam, American Samoa, and the Commonwealth of the Northern Mariana Islands. A resident commissioner represents Puerto Rico.  - source 

You can search for your current representatives by State here:

https://www.house.gov/representatives

US Senators are a group of leaders within Congress, along with their counterparts in the House of Representatives.  Senators have a select number of powers and procedures that the American constitution has bestowed upon them.  Their role includes censure, declaration of war, expulsion, filibuster & cloture, impeachment, investigations, nominations, rules, treaties, and voting.  - source

You can search for your current US Senators by State here:

https://www.senate.gov/senators/

Powers not granted to the Federal government are reserved for States and the people, which are divided between State and local governments.

Most Americans have more frequent contact with their State and local governments than with the Federal Government. 

Police departments, libraries, and schools—not to mention driver’s licenses and parking tickets—usually fall under the oversight of State and local governments. Each state has its own written constitution, and these documents are often far more elaborate than their Federal counterpart.   - source

You can search for your State's governing officials here:

https://www.usa.gov/state-governments