sidneySidney is a city in and the county seat of Cheyenne County, Nebraska, United States. [5] The city is nine miles (14 km) north of the Colorado state . The population was 6,410 at the 2020Situated at the shore of the Salish Sea, Sidney’s historic and vibrant downtown district is the heart of the Saanich Peninsula. Locally owned storefronts, coffee shops, eateries, and more offer