CALLIS, TEXAS. Callis, also known as Oak Grove, was twenty-five miles northeast of McKinney in northeastern Collin County. A post office operated there from 1891 through 1904. By 1900 the community had a population of fifty, two stores, a cotton gin, a church, and a school. Its population stood at twenty-five by the mid-1940s, the last time population statistics were reported.
Roy Franklin Hall and Helen Gibbard Hall, Collin County: Pioneering in North Texas (Quanah, Texas: Nortex, 1975).
The following, adapted from the Chicago Manual of Style, 15th edition, is the preferred citation for this article.Brian Hart, "CALLIS, TX," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/hvc13), accessed December 22, 2014. Uploaded on June 12, 2010. Published by the Texas State Historical Association.