RCREB is a non-profit organization. Established in 1975. RCREB now represents over 140 members and over 20 Brokerage/Branch offices in the County of Renfrew. We are the leader in providing support to the professional REALTOR® through knowledge, communication, service and advocacy. jjRenfrew County is known for its lakeside cottages and white-water rafting along the Ottawa River, and has more than 900 lakes. Renfrew County is also the largest county in terms of area in Ontario, ahead of Hastings County.