| Official Name: | Seis Lagos, Texas |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Texas#USA |
| Pushpin Label: | Seis Lagos |
| Coordinates: | 33.0711°N -96.5664°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Texas |
| Subdivision Type2: | County |
| Subdivision Name2: | Collin |
| Area Footnotes: | [1] |
| Area Total Km2: | 2.08 |
| Area Land Km2: | 1.96 |
| Area Water Km2: | 0.11 |
| Population As Of: | 2020 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 561 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 75098 (Wylie) |
| Area Code: | 214, 469, 972, 945 |
| Blank Name: | FIPS code |
| Blank Info: | 48-66686 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2805759 |
Seis Lagos is a gated community and census-designated place (CDP) in Collin County, Texas, United States. It was first listed as a CDP prior to the 2020 census.
The Seis Lagos Community is located in Lucas, Texas, but outside the city municipality, in the extraterritorial jurisdiction. The State designates certain areas as the extraterritorial jurisdiction of municipalities to promote and protect the general health, safety, and welfare of persons residing in and adjacent to the municipalities.
It is in the southern part of the county, bordered to the north, west, and south by the city limits of Lucas. It is northeast of the center of Dallas. As suggested by the name, six lakes have been built into the rolling terrain of the community.
Seis Lagos was developed by Joe Duncan, the original owner of Southfork Ranch. He built his family home in 1970 and the home and ranch were featured in the 1970s and 1980s television show Dallas. Seis Lagos was developed by Joe Duncan with Duncan Developments.
Seis Lagos first appeared as a census designated place in the 2020 U.S. Census.
| White alone (NH) | 1,124 | 77.52% | |
| Black or African American alone (NH) | 31 | 2.14% | |
| Native American or Alaska Native alone (NH) | 12 | 0.83% | |
| Asian alone (NH) | 76 | 5.24% | |
| Pacific Islander alone (NH) | 1 | 0.07% | |
| Other race alone (NH) | 4 | 0.28% | |
| Mixed race or Multiracial (NH) | 88 | 6.07% | |
| Hispanic or Latino (any race) | 114 | 7.86% | |
| Total | 1,450 | 100.00% |