Union County is a county in the northern part of the U.S. state of New Jersey. As of the 2020 United States census, the county was the state's seventh-most-populous county with a population of 575,345, its highest decennial count ever and an increase of 38,846 (+7.2%) from the 2010 census count of 536,499. Its county seat is Elizabeth, which is also the most populous municipality in the county, with a 2020 census population of 137,298, and the largest by area, covering 13.46 square miles (34.9 km2). The county serves as a transition point between the Central Jersey and North Jersey regions of the state.
Oakland County is a county in the U.S. state of Michigan. It is a principal county of the Detroit metropolitan area, containing the bulk of Detroit's northern suburbs. Its seat of government is Pontiac, and its largest city is Troy. As of the 2020 census, its population was 1,274,395, making it the second-most populous county in Michigan, and the most populous county in the United States without a city of 100,000 residents. Founded in 1819 and organized the following year, Oakland County is composed of 62 cities, villages, and townships. In 2010, Oakland County was among the ten wealthiest counties in the United States to have over one million residents. It is also home to Oakland University, a large public institution that straddles the border between the cities of Auburn Hills and Rochester Hills.
The Las Vegas Metropolitan Police Department is a combined city and county law enforcement agency for the City of Las Vegas and Clark County, Nevada, United States. It is headed by the Sheriff of Clark County, who is publicly elected every four years. The sheriff is the only elected head law enforcement officer within the county, and, as such, the department is not under the direct control of its jurisdictional cities, Clark County, or the State of Nevada.
The United States police-rank model is generally quasi-military in structure. A uniform system of insignia based on that of the US Army and Marine Corps is used to help identify an officer's seniority.
The Will County Sheriff's Office is the principal law enforcement agency that serves Will County, Illinois. It is the second largest sheriff's department in Illinois, with approximately 650 sworn and civilian employees when at full operational strength. It is headed by the Sheriff of Will County, currently Mike Kelley.
