The Illinois lobbyist search is a free public database run by the Secretary of State at apps.ilsos.gov/lobbyistsearch. Enter a last name, pick a year, and the tool returns the lobbyist’s registration profile, the clients they are authorized to represent, and links to their expenditure filings. Records go back to 2000.1Illinois Secretary of State. Lobbyist Information Search
Running a Search
The default screen asks for two things: Lobbyist Last Name and Year. Pick a specific registration year or choose “All” to pull every year on file. Type the last name and hit search.1Illinois Secretary of State. Lobbyist Information Search
If more than one person matches, the results list shows enough detail to tell them apart. Click a name to open the full profile. You can also reach the tool from the Secretary of State’s lobbyist services page at ilsos.gov, where “Lobbyist Search” sits in the navigation.2Illinois Secretary of State. Lobbyist Information Search
Searching by Client or Employer
When you know the organization doing the lobbying but not the individual registered on its behalf, use the “Advanced Searches” link below the Lobbyist Name field. The advanced options let you query by employer or client, which is often the faster route for research starting from a company or trade group.1Illinois Secretary of State. Lobbyist Information Search
What a Lobbyist Profile Shows
Each profile includes the lobbyist’s name, business address, and registration year. It then lists every client or entity the lobbyist is authorized to represent. A single lobbyist frequently represents a dozen or more clients across different industries, and the profile puts those relationships in one place.
Profiles also link out to the lobbyist’s expenditure filings. Because the data stretches back more than two decades, pulling the same lobbyist’s profile across different years lets you see how their client roster has changed over time.
Reading the Expenditure Reports
The spending disclosures are the heart of the database. By statute, lobbyists must break their expenditures on public officials into these categories:3Justia Law. Illinois Code 25 ILCS 170 – Lobbyist Registration Act
- Travel and lodging, including accommodations arranged for officials during General Assembly sessions in Springfield.
- Meals, beverages, and entertainment.
- Gifts, with a notation if any are given on the basis of personal friendship.
- Honoraria.
- Other items of value, a catch-all requiring a description.
Illinois files these reports on an unusually tight schedule. Rather than annually or quarterly, lobbyists file semi-monthly: one report covers the 1st through the 15th of each month, another covers the 16th through the end. Each is due within five days of the close of the period. The result is up to 24 filings per lobbyist per year, giving a current view of spending activity.4Illinois Secretary of State. Illinois Lobbyist Electronic Expenditure Filing Instructions
Reports are required even when there was nothing to report in the period, so a long run of zero-expenditure filings is itself meaningful information. To open a lobbyist’s filings, click through from the search results to the profile and follow the expenditure report links. Many are available as downloadable documents.4Illinois Secretary of State. Illinois Lobbyist Electronic Expenditure Filing Instructions
What the Database Covers
The registration requirement reaches broadly. Illinois law covers paid lobbying at the state, municipal, county, and township levels, and it applies to both contract lobbyists at outside firms and in-house employees whose job includes government relations.5Illinois General Assembly. Illinois Code 25 ILCS 170 – Lobbyist Registration Act For a research purpose, that means a profile you pull is a paid lobbyist representing identified clients, not an unpaid advocate or a volunteer. Several categories of people are not required to register at all, including uncompensated committee witnesses, low-cost volunteers reimbursed no more than $500 per year, attorneys drafting bills as part of professional services, government employees acting in their official duties, and full-time employees of religious organizations lobbying to protect members’ right to practice their faith.6Cornell Law Institute. Illinois Admin Code Title 2, Section 560.210 – Persons Not Required to Register You won’t find any of them in the database.
Looking Up Federal Lobbyists
The Illinois tool only covers lobbying directed at Illinois government. For federal lobbying, use the Office of the Clerk of the U.S. House of Representatives at lobbyingdisclosure.house.gov. Federal registration kicks in when a firm earns more than $3,500 from a single client in a quarter, or when an organization’s in-house lobbying expenses exceed $16,000 in a quarter, with the next inflation adjustment scheduled for January 1, 2029.7Office of the Clerk, U.S. House of Representatives. Lobbying Disclosure Federal reports are filed quarterly, so for an organization active at both levels, the Illinois database will usually give you the finer-grained picture.