About the data

Illinois Lobby Guide

The Illinois Lobby Guide is an independent directory of the lobbyists registered with the Illinois Secretary of State and the clients and employers they represent. It takes the public registration record and makes it something you can actually use: searchable, readable, and up to date.

Every listing comes from the Illinois Secretary of State, Lobbyist Division: Lobbyist Entity Client Data (Illinois Data Portal, updated daily), 2026 registrations (2026 registration year (active lobbyists and active clients; terminated excluded)). The guide currently lists 2,264 lobbyists and 2,461 clients and employers, with 380 lobbying firms. The data was last refreshed on November 9, 2026.

We publish names, firms and organizations, the clients and employers each lobbyist represents, and city and state. We never publish phone numbers, street addresses or personal email addresses.

Lobbyists can claim their listing for free to add a bio and areas of expertise. Claims are checked by hand against the official record before anything changes.

What you will find here:

• Every registered lobbyist, A to Z, with the clients and employers they represent.
• Every client or employer that employs a registered lobbyist, and who lobbies for it.
• A link back to the official filing source on every profile.

To correct something, write to clerk@fiftydomes.com or claim the profile. Changes to an official filing must be made with the Secretary of State.

The Illinois Lobby Guide is published by Fifty Domes LLC and is not affiliated with the State of Illinois. See the Privacy Policy, Terms of Service and Refund Policy.