Garden County was formed in 1909 by popular vote in the general election of November 2, 1909, making the northern part of Deuel County into Garden County. Area Page: Western Nebraska AreaCounty Seat: Oshkosh NebraskaLicense Platte Prefix: 77Census 2010: 2,057Cities Towns in the County: Lewellen NebraskaLisco NebraskaOshkosh NebraskaCounty Map with Cities: Garden County MapWebsite - County: Garden County Nebraska Official Website