| Official Name: | Long Mott, Texas |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Texas#USA |
| Pushpin Label: | Long Mott |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Texas |
| Subdivision Type2: | County |
| Subdivision Name2: | Calhoun |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 26 |
| Coordinates: | 28.4825°N -96.7606°W |
| Area Code: | 361 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1340496 |
Long Mott is an unincorporated community in Calhoun County, Texas, United States. According to the Handbook of Texas, the community had a population of 76 in 2000. It is part of the Victoria, Texas Metropolitan Statistical Area.
German settlers arrived and established the location around 1853. The Upper and Lower motts, two sizable motts near San Antonio Bay, were home to the earliest settlements. Since the Upper Mott was the more extensive of the two, it was given the name Long Mott when a post office was opened for the hamlet in 1887. The first postmaster was Frederick W. Roemer. Anna Mary (Braentegam) Roemer and Dr. John were two more early settlers of Long Mott. One of the first Black residents was Guy Mission. In 1914, Long Mott listed 200 residents, a telephone connection, a lumber company, two general stores, and the St. Louis, Brownsville and Mexico Railway as its means of transportation. Long Mott had 75 residents in the early 1930s. In the 1930s and 1940s, the community's population was recorded at 75; in 1952, that number increased to 100. 1968 saw the population peak at 125, and from 1970 to 2000, 76 were recorded as living there.
Long Mott is located south of the intersection of Texas State Highway 185 and Farm to Market Road 2235 in western Calhoun County. It is near Guadalupe Bay.
In 1892, a school was founded in Long Mott, with Harriet (Reeves) Thayer as the initial instructor. Eleven pupils were taught by a single instructor in the community in 1904. Six teachers were teaching 133 White children in its classrooms by 1939, while one was teaching eighteen Black kids. Students from Long Mott were bused to Port Lavaca schools after the Long Mott school district was merged into the broader county school district in 1955.