THE SIENNA LAND BRIEF
Land in the
Floodplains and Low Terraces setting.
Sienna CDP has 12.6 square miles of land in Fort Bend County. Its Census reference point is in Floodplains and Low Terraces, within Western Gulf Coastal Plain.
Low coastal plains extend along the western Gulf, contrasting with more irregular inland country. Grassland was the principal natural cover, with river corridors and coastal features adding local variation.
Regional context: Western Gulf Coastal Plain ↗ · Classification at the Census reference point
Sienna and Fort Bend County
Sienna is associated with Fort Bend County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Sienna by land and water
The Census records 0.34 square miles of water within Sienna, or 2.6% of its total area. That share is close to Fort Bend County’s 2.6%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sienna CDP has 4.9 times the land area of nearby Arcola city (2.57 square miles). These areas describe boundaries, not comparable property prices.

