City · Texas
Knollwood, Texas
Knollwood, city, in Grayson County, Texas. Knollwood had 809 residents on July 1, 2025 by the Census Bureau's estimate, up 5.9% since 2020; the 2020 Census counted 764 and the ACS 2020-2024 5-year estimates put it at 701 (±167). GEOID 4839680.
Residents, July 2025 estimate
809
Census Bureau estimate (no margin published)
2020 Census count: 764 · ACS 2020-2024: 701 ±167
Median household income
$55,819
±$8,463 (90% margin)
Texas: $78,476
Median home value
not published
Texas: $283,800
Median gross rent
$1,316
±$103 (90% margin)
Texas: $1,403
Where is Knollwood and what county is it in?
Knollwood is a city in Grayson County, Texas. It covers 0.3 square miles of land, 2,351 residents per square mile in 2020.
Knollwood is in the Sherman-Denison, TX metropolitan statistical area (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Knollwood, and is it growing?
The Census Bureau estimates that 809 people lived in Knollwood on July 1, 2025, up 5.9% since 2020, slower than Texas (+8.8%). The 2020 Census counted 764 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 701 (±167).
| Measure | Knollwood | Grayson County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 701 ±167 | 143,337 | no clear change |
| Households | 401 ±95 | 55,248 | no clear change |
| Average household size | 1.75 ±0.24 | 2.55 | no clear change |
| Housing units | 418 ±93 | 62,132 | no clear change |
Knollwood's population since 2000
From 375 in 2000 to 809 in 2025: up 115.7%. The 2000, 2010 and 2020 figures are census counts, each for Knollwood as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Knollwood?
The median resident of Knollwood is 31.8 years old; 15.3% are under 18 and 19.7% are 65 or older. The largest group is non-Hispanic white residents at 67.0%, then non-Hispanic residents of two or more races at 12.0%.
| Measure | Knollwood | Grayson County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 31.8 ±8.9 | 39.0 | no clear change |
| Under 18 years | 15.3% ±6.7 pts | 24.0% | – |
| 65 years and over | 19.7% ±8.4 pts | 18.1% | – |
| Male | 51.4% ±6.7 pts | 48.9% | – |
| Hispanic or Latino (any race) | 8.7% ±7.7 pts | 16.3% | – |
| White alone, not Hispanic | 67.0% ±10.4 pts | 71.1% | −17.6 pts |
| Black or African American alone, not Hispanic | 4.1% ±3.3 pts | 5.1% | – |
| Asian alone, not Hispanic | 6.1% ±6.2 pts | 1.5% | – |
| American Indian and Alaska Native alone, not Hispanic | 1.6% ±2.0 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±6.9 pts | 0.1% | – |
| Two or more races, not Hispanic | 12.0% ±6.5 pts | 4.9% | – |
| Some other race alone, not Hispanic | 0.4% ±0.8 pts | 0.5% | – |
| Born outside the United States | 11.0% ±7.3 pts | 7.7% | – |
| Speak a language other than English at home (age 5+) | 14.3% ±9.6 pts | 12.4% | – |
| Civilian veterans (age 18+) | 14.3% ±6.5 pts | 8.4% | – |
| With a disability | 13.7% ±5.1 pts | 13.6% | – |
| No health insurance coverage | 19.5% ±7.3 pts | 15.7% | no clear change |
| High school graduate or higher (age 25+) | 96.9% ±2.6 pts | 89.9% | – |
| Bachelor's degree or higher (age 25+) | 20.4% ±8.4 pts | 23.9% | no clear change |
| Graduate or professional degree (age 25+) | 9.1% ±7.8 pts | 7.8% | – |
| Lived in the same house a year earlier | 81.5% ±8.7 pts | 82.9% | – |
| Moved from another state in the past year | 9.1% ±8.3 pts | 1.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Knollwood earn?
Half of Knollwood's 401 households earn less than $55,819 a year (±$8,463), against $72,182 in Grayson County and $78,476 in Texas. In 2015-2019 it was $66,765 in 2024 dollars; the margins of error cannot tell the two periods apart. 9.4% of residents live below the poverty line.
| Measure | Knollwood | Grayson County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $55,819 ±$8,463 | $72,182 | no clear change |
| Mean household income | $65,768 ±$11,471 | $98,000 | – |
| Per capita income | $36,134 ±$7,880 | $38,174 | no clear change |
| People below the poverty line | 9.4% ±5.1 pts | 11.2% | – |
| Children under 18 below the poverty line | 4.0% ±7.4 pts | 15.9% | – |
| Households receiving SNAP | 4.7% ±4.0 pts | 8.3% | – |
| Households with a computer | 93.5% ±6.5 pts | 95.1% | – |
| Households with a broadband subscription | 85.8% ±7.9 pts | 89.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Knollwood?
Owners occupy 31.2% of Knollwood's occupied homes and renters 68.8%. The median renter pays $1,316 a month including utilities, and 30.1% of renters pay 35% or more of their income on rent.
| Measure | Knollwood | Grayson County | Change since 2015-2019 |
|---|---|---|---|
| Median gross rent | $1,316 ±$103 | $1,310 | no clear change |
| Renters paying 35% or more of income on rent | 30.1% ±12.1 pts | 44.2% | – |
| Median monthly owner costs, with a mortgage | $1,342 ±$281 | $1,830 | – |
| Owner-occupied homes | 31.2% ±10.0 pts | 66.8% | no clear change |
| Renter-occupied homes | 68.8% ±10.0 pts | 33.2% | – |
| Housing units | 418 ±93 | 62,132 | no clear change |
| Homeowner vacancy rate | 0.0% ±31.7 pts | 1.0% | – |
| Rental vacancy rate | 3.8% ±6.0 pts | 3.3% | – |
| Single-family detached homes | 0.5% ±0.9 pts | 71.8% | – |
| Mobile homes | 34.4% ±9.8 pts | 8.9% | – |
| Built 2020 or later | 7.9% ±7.2 pts | 4.4% | – |
| Built 2010 to 2019 | 30.6% ±9.5 pts | 14.4% | – |
| Built 1939 or earlier | 0.0% ±11.3 pts | 6.9% | – |
| Households with no vehicle | 2.5% ±3.0 pts | 3.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Knollwood work and get to work?
86.9% of Knollwood's workers drive alone and 9.7% work from home. The average trip to work takes 20.8 minutes.
| Measure | Knollwood | Grayson County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 74.8% ±8.3 pts | 62.5% | – |
| Unemployment rate | 6.9% ±7.4 pts | 3.1% | – |
| Drove alone to work | 86.9% ±6.4 pts | 72.5% | – |
| Carpooled | 1.5% ±2.2 pts | 11.6% | – |
| Public transportation | 0.5% ±1.0 pts | 0.4% | – |
| Walked | 1.5% ±2.4 pts | 1.5% | – |
| Worked from home | 9.7% ±6.3 pts | 12.6% | – |
| Mean travel time to work | 20.8 min ±4.4 | 25.8 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Knollwood?
No census tract lies mostly in Knollwood; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9.04Grayson County | 5,384 | $91,058 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Knollwood) · Census block assignment files
How does Knollwood compare with other places in Texas?
By the Census Bureau's July 2025 estimates, Knollwood is the 11,197th-most populous of the 19,476 U.S. incorporated places that have one and the 877th-most populous of 1,224 in Texas.
Knollwood is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 877th | 1,224 |
Knollwood's figures with every place in Texas (CSV)
Every place in Texas, sortable · Compare Knollwood with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Knollwood?
22 of the 56 figures for Knollwood on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Knollwood are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Knollwood.