Who is my Illinois state legislator?

The Illinois General Assembly has 59 Senate districts and 118 House districts. Both are drawn over the same ground and neither follows a city, county or ZIP boundary, so the only way to know which pair covers an address is to put the address on the map. Senators serve staggered two- and four-year terms and representatives two-year terms.

Or open the map and pick your location on it:

Opens the map with both chambers on. Search your address or ZIP, or tap your location.

What the lookup shows

Two chambers, two maps

An address has one district in each chamber and the two rarely share a boundary: the chambers are apportioned separately, and in several of these states one chamber's districts are built by pairing the other's. The table below lists both in full, so a reader who knows their district number can look up the member without opening the map at all.

Where the names come from

Both rosters are re-read on a schedule from the legislature's own published member lists and land as a reviewed pull request; the map names no officeholder it cannot cite. A seat the source does not name is shown as unnamed rather than filled in.

Who represents each Illinois Senate district

All 59 seats on the Illinois Senate, as this site had them on September 11, 2026. The map above reads the same roster, so a card and this table cannot disagree — but a table is a claim about a day, and this one names its day. Where the roster names nobody it says so rather than guessing. Where these names come from.

Who represents each Illinois House of Representatives district

All 118 seats on the Illinois House of Representatives, as this site had them on September 11, 2026. The map above reads the same roster, so a card and this table cannot disagree — but a table is a claim about a day, and this one names its day. Where the roster names nobody it says so rather than guessing. Where these names come from.

Related lookups

• What district am I in?Every district that covers one point in Illinois, and who represents you there.
• Who is my U.S. representative?The other half of the answer, on its own page.
• New York CityThe same lookup, 5 boroughs.