Shamrock is a city in Wheeler County, Texas, United States. As of the 2010 census, the city had a total population of 1,910. The city is located in the eastern portion of the Texas Panhandle centered along the crossroads of Interstate 40 and U.S. Route 83. It is 110 miles east of Amarillo, 188 miles west of Oklahoma City, Oklahoma, and 291 miles northwest of Dallas.