IL official voter registration lookup
WorkingFree
Official voter registration status lookup. Required inputs: name + date of birth + ZIP. Returns the person's own registration status/polling place; not a general people search.
Illinois political and campaign finance records
Campaign finance, lobbying, financial disclosure and voter registration lookups. 3 official sources, linked directly to the government site.
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Statewide (3)
Illinois contribution search
WorkingFree
Official campaign finance disclosure. Contributor-name search: typically supported (search contributions by contributor/donor name); not tested here — check the site's search options.
Illinois lobbyist search
WorkingFree
Official lobbyist registration / lobbying disclosure search: lobbyists, firms and the clients (principals) they represent.