States · Texas · Fort Bend County

Sienna, Texas.

A community in Fort Bend County, with no city government of its own. Zillow publishes no home prices for it: see Fort Bend County’s.

Living in Sienna, Fort Bend County, Texas

Sienna, in Fort Bend County, had 20,204 people in the 2020 census. Half its households earn more than $177,837 a year and half less, against $114,041 across Fort Bend County; 2% of its people live below the poverty line. 96% of its homes are lived in by their owners and 4% are rented. Unemployment in Fort Bend County was 4.8% in August 2026, and the county had 3.8% more jobs in 2025 than the year before. The most residents work in schools and health care, then professional services.

People 20,204 in the 2020 census; median age 35.9
Household income $177,837 the median, give or take $18,675 · Fort Bend County: $114,041
Unemployment 4.8% Fort Bend County, August 2026; 4.7% a year before
Homes 96% lived in by their owners; 4% rented
  • 7,225households
  • 66%of adults have a degree
  • 2%below the poverty line
  • 36 mintypical commute
  • 22%work from home

What residents work in

  • Schools, hospitals and social care28%
  • Professional and business services14%
  • Manufacturing11%
  • Transport, warehouses and utilities10%
  • Restaurants, hotels and entertainment8%
  • Banks, insurance and property8%

Employed residents by industry, from the Census survey. Fort Bend County had 260,929 jobs in 2025, 3.8% more than the year before (Bureau of Labor Statistics).

Weather through the year

Average daily high and low for each month: coldest in January, 63° and 43°; warmest in August, 93° and 74° 40° 50° 60° 70° 80° 90° 100° J 63° 43° F M A M J J A 93° 74° S O N D
Average daily high and low for each month: coldest in January, 63° and 43°; warmest in August, 93° and 74° 40° 50° 60° 70° 80° 90° 100° J 63° 43° F M A M J J A 93° 74° S O N D

Coldest in January, with highs near 63° and lows near 43°; warmest in August, with highs near 93° and lows near 74°. About 50 inches of rain a year, and little or no snow.

Average daily high and low, 1991–2020, at the Thompsons Wsw weather station, 8 miles away (NOAA).

Largest workplaces in Fort Bend County

  1. Katy ISDSchool district12,969FTE
  2. Fort Bend ISDSchool district10,195FTE
  3. Lamar CisdSchool district4,802FTE
  4. IES ResidentialElectrical contractors3,374
  5. Methodist Sugar Land HospitalGeneral hospital2,455FTE
  6. AmazonGeneral warehousing and storage2,434
  7. Memorial Hermann KatyGeneral hospital1,505FTE
  8. UPSCouriers and express delivery services1,309

Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 369 workplaces with 20 or more staff, 64,622 people in all across the county; Sienna has one of its own. School districts come from the Common Core of Data (NCES, 2023–24) and hospitals from their Medicare cost reports (CMS, 2023); FTE marks full-time equivalent staff. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.

Natural hazards

  1. TornadoesRelatively high
  2. LightningRelatively high
  3. Hurricanesrelatively high in parts of SiennaRelatively moderate
  4. Heat wavesrelatively high in parts of SiennaRelatively moderate
  5. Ice stormsRelatively moderate
  6. Cold wavesRelatively moderate

FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Sienna’s census tracts, against the rest of the country; all of them together, relatively moderate. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.

From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on Fort Bend County.