History :
The town of Seago was founded in 1876 by a gentleman named T.K. Seago (1836-1904). Mr. Seago cleared his land of dense timber and built the first store in the area. His stock consisted of $200 in dry goods and groceries. Mr. Seago was postmaster of Seago in 1881 and was known to be in the area until at least 1883. Mr. Seago moved from here to Comanche, Texas and represented Comanche County in the Texas Legislature.

The first school in Seago, known as Brinegar School, was built around 1867. It was a one room log building with split log seats. The school was located somewhere in the vicinity of what is now known as Heard Park. The next school building was built by professor J.T. Doss in 1880. It was a frame building and was destroyed by fire in 1909. A brick building was built in 1910 as a high school on a site that is currently the home of Seagoville Elementary School on Kaufman Street.

The current Federal Correctional Institution was first built in the 1930's as a women's detention station on land located on the west side of Seagoville near Highway 175. Since its inception, the institution has contributed enormously to the economy of the City with jobs and an influx of federal employees from all over the country.

In 1979, Seagoville celebrated its 100th birthday with the biggest celebration in its history. Letters of greeting were received from President Jimmy Carter and Governor Bill Clements among others. Today, Seagoville has a population of about 12,500 with a service area population of over 33,000. Seagoville is a part of Dallas Independent School District and all of its schools serving Seagoville are modern in design.