Real estate agents in Williamson County, IL
No agents are listed for Williamson County yet. Agents appear here only after they choose to.
Williamson County by the numbers
- Active licensees
- 167
- Brokers
- 118
- Managing brokers
- 45
- Residential leasing agents
- 4
- Licensed brokerage firms
- 15
- First licensed in the last 12 months
- 20
Source: Illinois Department of Financial and Professional Regulation via data.illinois.gov, ODbL (public record), as of October 23, 2026. Counted by the address city and county on file with the state (county filled from the ZIP code when the state left it blank). Active means an active license.
Franchise offices in Williamson County
6 real estate franchise offices list an address in Williamson County: 4 Century 21 and 2 Coldwell Banker.
- CENTURY 21 House of Realty, Inc. 1400 West Main Street, Carbondale, 62901 (618) 457-3344 · Office site
- CENTURY 21 House of Realty, Inc. 108 West Plaza, Carterville, 62918 (618) 985-3717 · Office site
- Coldwell Banker Preferred Realty 100 W Plaza Dr, Carterville, 62918 (618) 985-4242 · Office site
- CENTURY 21 House of Realty, Inc. 12097 Lake of Egypt Road, Marion, 62959 (618) 964-1447 · Office site
- CENTURY 21 House of Realty, Inc. 612 N. Market St, Marion, 62959 (618) 997-6495 · Office site
- Coldwell Banker J. David Thompson, Realty 104 S Carbon St, Marion, 62959 (618) 997-1868 · Office site
Source: All The Places (CC-0), from each brand's public office locator, as of October 18, 2026. Not affiliated and not a recommendation; confirm details with the office.
Cities in Williamson County with franchise offices
- Marion3 offices
- Carterville2 offices
- Carbondale1 office
Real estate license guides for Williamson County cities
Getting licensed? How to get an Illinois real estate license
Choosing an agent
- Ask how long they have worked in Williamson County and what they sold or helped buy there recently.
- Look at their website and listings to see how they present a home.
- Check that their license is active with the state real estate commission.
Are you an agent in Williamson County?
Get a free website, add Williamson County to "Markets I serve" and switch on the directory listing. Brokers can put the whole office on one plan.
Listings here are chosen by each agent and are not a recommendation. Property Landing Pages is not a brokerage.