[5] The Dallas Business Journal has ranked Celina as the fastest-growing city in the Dallas–Fort Worth metroplex for three consecutive years (2019-2021).

By 1884, Celina had a gristmill, cotton gin, school, several general stores, and a drug store that has been opened in “Old Celina.”[10] In 1902, news had reached Celina that the St. Louis, San Francisco, and Texas Railway would be constructed and extended to reach the area.

[10] A town site company secured land for the new “Celina,” which was part of a pasture belonging to the late William Willock.

Because of the higher price, the merchants began locating north of Main Street and west of the railroad.

By July 1911, Smith's effort had paid off as several new buildings were ready for use and gravel streets were constructed, which gave Celina the appearance of a wide-awake, growing little city.

This was a pivotal moment in Celina's character as it marked the shift towards the brick features that define the Downtown Square today.

During World War II, the diversification of commerce in the Downtown Square continued as it served as a collection points for scrap iron.

[12] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

Celina has grown steadily after World War II until the significant population increase beginning in 2010.

Its growing non-White American population has been attributed to nationwide demographic trends of greater diversification.

Most parts of Denton County, including the Prosper ISD covering Celina, are in the zone for North Central Texas College.

[12] Celina is a home-rule municipality, governed by a mayor and city council who are elected by the residents.

Each year, Celina hosts over 25 events with the majority of them occurring on the Historic Downtown Square.

The city hosts four main events: Cajun Fest (May), Splash & Blast (July), Beware!