Celina, Texas is a wonderful city that is now experiencing the change from a predominately farming community to an urban city. In doing so, it is maintaining the friendliness and charm that has made it such a wonderful place to live and work. Celina is also known for sports, where for example, the Celina High School Bobcats hold the Texas state record for the most consecutive wins and most state championships. The school district offers a gifted and talented program for all grade levels and the option of graduating with a Distinguished Achievement Diploma Celina is a city in Collin and Denton counties, Texas, United States. As of the 2010 census, Celina had a population of 6,028, up from 1,861 at the 2000 census.