Oligometastases describes a clinical scenario in which a patient has metastases limited in number and extent. Our study describes the outcome of 40 patients with oligometastatic breast cancer, with 5 or fewer radiographically apparent metastatic lesions, treated with curative-intent stereotactic body radiation therapy (SBRT).  Patients with metastases to more than one organ were not excluded.  The actuarial 4-year overall survival was 59%, progression-free survival was 38% and lesion local control (freedom from radiographic growth) was 89%.  Patients with bone-only metastases fared better with respect to survival and disease control.  Bulkier lesions exhibited poorer local control.  The survival and progression free survival numbers are promising.  Breast cancer can have a prolonged disease course, and thus longer follow-up is needed to confirm the hypothesis that oligometastatic disease is potentially curable with multimodality therapy incorporating SBRT.