A study was conducted to determine if static sector characteristics are related to the occurrence of operational errors (OEs) at the Indianapolis Air Route Traffic Control Center (ZID). The data consisted of a three-year sample of OEs that had occurred in ZID airspace. Sectors were treated as the unit of analysis (n=40). The static characteristics included: number of major airports, cubic volume in nautical miles, sector strata, number of shelves, number of VORTACs, number of satellite airports, and number of intersections. Pearson correlations revealed that cubic volume in nm (r = -.31, p = .049) and sector strata (r = .31, p = .049) were significantly correlated with the number of OEs.