The Omaha Police Department (OPD) is the principal law enforcement agency of the city of Omaha, Nebraska, United States. It is nationally accredited by the Commission on Accreditation for Law Enforcement Agencies. The OPD is the largest law enforcement agency in the state of Nebraska. The OPD has 902 sworn officers covering an area of 118.9 square miles (308 km2) and a population of 478,192 people (2019 census estimate) within city limits.