The History of Trinidad, Texas

Settlement in the Trinidad area began before 1840, when the Trinity River — originally called the Trinidad River — was a barrier that ferries helped travelers cross. O. M. Airhart ran a ferry near the present townsite, and Zach Smith operated another a few miles north. These crossings made the area a node of frontier travel, and by 1844 the settlement had recorded a general store and a saloon.

The river that gave the town its name was central to its early life, both as an obstacle to cross and as a feature that drew people to the spot. Those ferry crossings were the first stirrings of what would become the town of Trinidad.

Trinidad was truly founded by the railroad. When the St. Louis Southwestern — the Cotton Belt line — built through in 1880, it established a station here as a water and refueling stop, and the place became known as Trinity Switch for its location on the Trinity River.

When residents applied for a post office in 1880, the name Trinidad was chosen instead of Trinity Switch to avoid duplicating another Texas post office's name, though records suggest the Trinidad post office didn't actually open until 1891. The railroad gave the small community its commercial footing, and by 1910 it had five businesses and a population of about seventy.

Trinidad's defining transformation came in the 1920s. The town had remained small until Texas Power and Light opened a plant on the Trinity River, and a Lone Star Producing Company plant began manufacturing chemical fertilizer in the area. By 1926, Texas Power and Light was building a power plant at Trinidad specifically to tap the region's lignite coal deposits for electricity generation.

That industrial development brought jobs and growth, and the power plant became a cornerstone of the local economy — a role that endured for generations. The population rose and fell with the times, from about 750 in 1930 to 550 by 1940 and back over 1,000 by the 1990s. Today Trinidad is a small community of around 860, blending its frontier-and-railroad heritage and industrial history with its setting along the Trinity River and near Cedar Creek Lake.