Brentwood had an estimated 45,313 people on July 1, 2025, the Census Bureau says, almost unchanged since 2020 after 22% growth from 2010 to 2020.

Last checked Oct. 17, 2026. Figures come from the U.S. Census Bureau: QuickFacts (Vintage 2025 population estimates), the 2000, 2010 and 2020 censuses, and the 2020-2024 American Community Survey five-year estimates. Survey figures are estimates with margins of error.

Brentwood had an estimated 45,313 residents on July 1, 2025, the Census Bureau says. That is almost exactly the 2020 census count of 45,373, a change of -0.1%. Brentwood nearly doubled between 2000 and 2020 but has held steady since, while Williamson County around it kept growing.

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Population over time

Bar chart of Brentwood's population: 23,445 in the 2000 census, 37,060 in 2010, 45,373 in 2020 and an estimated 45,313 on July 1, 2025

Count Brentwood Change
2000 census 23,445
2010 census 37,060 +58.1%
2020 census 45,373 +22.4%
July 1, 2025 estimate 45,313 -0.1%

Growth in Brentwood is guided by the city’s long-range plan, the Brentwood 2030 Plan, and the city is now writing a 2040 update. See our building permits and zoning guide.

Brentwood against the county and its neighbors

Place 2020 census July 1, 2025 estimate Change
Brentwood 45,373 45,313 -0.1%
Williamson County 247,726 272,061 +9.8%
Franklin 83,454 90,226 +8.0%
Nolensville 13,829 15,789 +14.3%
La Vergne 38,719 42,146 +8.9%
Smyrna 53,070 63,321 +19.2%

Change is measured from the April 1, 2020, estimates base, as QuickFacts reports it. Nolensville, about six miles east, and Smyrna, about 14 miles away, grew fastest of these neighbors.

Who lives in Brentwood

From the Census Bureau’s 2020-2024 American Community Survey five-year estimates:

Measure Brentwood Williamson County Tennessee
Median age 44.9 40.4 38.9
Under 18 26.8% 25.8% 22.2%
65 and older 16.3% 14.8% 17.1%
Median household income $182,088 $135,594 $69,595
Bachelor’s degree or higher (25 and older) 73.8% 62.7% 31.1%
Below the poverty line 3.6% 4.6% 13.8%

Brentwood is both older and more family-heavy than the county: its median age is more than four years higher, yet more than a quarter of residents are children.

Households and housing

Measure Brentwood Williamson County
Households 14,855 92,214
People per household 3.07 2.82
Owner-occupied homes 90.4% 78.8%
Housing units 15,557 96,921
Median home value (owner estimate) $1,031,300 $751,900
Median gross rent $2,825 $1,969

Nine in 10 Brentwood households own their home, well above the county rate. For current market values, which run higher than the survey’s owner estimates, see our home prices guide.

Where the numbers come from

  • The census counts everyone every 10 years; the 2020 count is the official population for most legal purposes.
  • Population estimates update the count each July 1 from births, deaths and migration. The Vintage 2025 series is the latest.
  • The American Community Survey samples households every year; the five-year estimates pool 2020 to 2024 and carry margins of error, which are larger for small groups.

Related guides: Brentwood history and landmarks, moving to Brentwood and schools.

Frequently asked questions

What is the population of Brentwood, Tennessee?

45,313 on July 1, 2025, according to the Census Bureau’s latest estimate. The 2020 census counted 45,373.

Is Brentwood, TN growing?

Not lately. Brentwood grew 22.4% from 2010 to 2020, from 37,060 to 45,373, but the Census Bureau estimates a 0.1% dip from 2020 to 2025, while Williamson County grew 9.8%.

What is the median household income in Brentwood, TN?

$182,088, according to the Census Bureau’s 2020-2024 American Community Survey estimates, compared with $135,594 for Williamson County.

What is the median age in Brentwood?

44.9, older than Williamson County’s 40.4 and Tennessee’s 38.9, by the 2020-2024 American Community Survey.