198th

198th may refer to:


 * 198th Airlift Squadron flies the C-130 Hercules
 * 198th Battalion (Canadian Buffs), CEF, a unit in the Canadian Expeditionary Force during the First World War
 * 198th Division (People's Republic of China), a military formation of the People's Volunteer Army during the Korean War
 * 198th Infantry Brigade, was first formed as part of the United States Army Reserve's 99th Division