About Mainstreet


Mainstreet Organization of REALTORS® has a long history of serving REALTORS® and the communities our members reside, work and volunteer in. What began in 1921 as the then DuPage Association of REALTORS®, the organization grew and merged many times to become Mainstreet Organization of REALTORS® in 2007.

Today, with more than 20,000 members, Mainstreet and our members cover more than 200 municipalities in DuPage County, Lake County and Western and Southern Suburban Cook County.

Mainstreet Organization of REALTORS®

Main Number: 630.324.8400

Downers Grove

Headquarters :: 6655 Main Street, Downers Grove, IL 60516

Rolling Meadows

3701 Algonquin Road, Ste. 650, Rolling Meadows, IL 60008


1580 S. Milwaukee Avenue, Suite 312, Libertyville, IL 60048

Tinley Park

16345 S. Harlem Avenue, Suite 200, Tinley Park, IL 60477