English: Lockwood is a census-designated place (CDP) in Yellowstone County, Montana, United States. Lockwood had the largest growth rate in the state of Montana with 57.8% growth since 2000. The 2010 census put Lockwood’s population at 6,797. Lockwood is a suburb of Billings and is the second largest community in the Billings Metropolitan Area. Annexation of Lockwood to Billings has been studied; however, the June 2009 Billings City Council Annexation Plan states that the city has no plans to annex Lockwood in the foreseeable future.