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Background While surgery remains the mainstay of treatment for limb sarcoma, extreme old age is a relative contraindication to oncological surgery. Methods Patients >80 years referred with primary extremity soft-tissue sarcoma (ESTS) between 2007 and 2016 were retrospectively reviewed. Prognostic variables, including ASA status and Clinical Frailty Scores, were collected. Endpoints were perioperative morbidity, locoregional (LRR) and distant recurrence (DR), disease-specific survival (DSS) adjusted using competing risk modelling, and overall survival (OS). Results A total of 141 primary tumours were identified, with 116 undergoing resections. Main motives for nonoperative management were severe frailty or significant comorbidity (56.0%). The operative group had a median age of 84 (range 80-96) years and median follow-up of 16 months (range 0-95). 45.7% of patients received radiotherapy. Median hospital stay was 7 (range 0-40) days, with frailty (p = 0.25) and ASA (p = 0.28) not associated with prolonged admission. 12.9% developed significant complications, with one perioperative mortality. 24.1% had LRR, occurring at a median of 14.5 months. All patients with reported DR (28.4%), except one, died of their disease. Frailty did not confer a significant difference in adjusted LRFS (p = 0.95) and DMFS (p = 0.84). One- and 5-year adjusted DSS and OS was 87.0% versus 74.9% and 62.3% versus 27.4%, respectively. Frailty (CFS ≥4) was associated with worse OS (hazard ratio [HR] 2.49; 95% confidence interval [CI] 1.51-4.12; p < 0.001), however not with adjusted DSS (p = 0.16). Nonoperative management conferred a 1- and 5-year adjusted DSS was 58.3% and 44.4%, respectively. Conclusions Extremity surgery for sarcoma is well tolerated in the frail very elderly population with low morbidity and comparable oncological outcomes.