Celina, Texas has recently evolved from a quiet little town just east of the Denton and Collin County lines, and it apparently is no secret to anyone seeking a new home in the Lone Star State. Just 4 years ago, Celina (Pronounced Sil-EYE-nuh – similar to Salina, Kansas) had a very small town feeling with a population at the 2020 census of just under 17,000 residents.