DATA HUB
Millbrae's Growth, by the Numbers
Millbrae is growing — steadily, not explosively. These numbers show how our city has changed and who lives here today — so neighbors can make up their own minds with clear, honest, sourced data.
Residents added each decade.
Growth has been real but gradual. The bars below show how many residents Millbrae added in each decade between U.S. Census counts — the kind of steady change that needs honest, forward-looking planning, not panic.
Derived from U.S. Census Bureau decennial counts (1990–2020).
Data you can actually read.
01 GROWTH IN CONTEXT
Millbrae's growth is steady, not explosive — a few hundred to a couple thousand new neighbors per decade. Seeing the trend clearly helps us plan for housing, traffic, and services without overreacting.
02 TRANSPARENCY BY DEFAULT
Numbers should be easy to follow. Plain-English labels and simple visuals — not dense spreadsheets — let residents see what's happening and ask better questions at City Hall.
03 HONEST FIGURES
Every figure here comes from a public source — the U.S. Census and its American Community Survey — cited on each panel. Nothing is invented or estimated for effect; the goal is plain, accountable framing.
Millbrae, by the numbers.
A city growing steadily. Here is Millbrae's population at each U.S. Census — modest, manageable growth that still adds real pressure on housing, traffic, and city services.
Source: U.S. Census Bureau — decennial counts (1990–2020).
MILLBRAE · BY THE NUMBERS
Our community, in clear numbers.
Plain, sourced facts about Millbrae — how the city has grown, who lives here, and the basics of our housing. Every figure comes from a public source, cited so you can check it yourself.
Source: U.S. Census Bureau — decennial counts, 1950–2020.
- Under 18 19%
- 18–64 61%
- 65 and over 20%
Source: U.S. Census Bureau, ACS 2020–2024 5-year. Median age 43.7.
- Occupied 95.3%
- Vacant 4.7%
Source: U.S. Census Bureau, 2020 Decennial Census (8,679 housing units).
Change between U.S. Census counts. Source: U.S. Census Bureau, 1980–2020.
Source: U.S. Census Bureau (2020 Census; ACS 2020–2024 5-year; 2024 Gazetteer); City of Millbrae. Density is population ÷ land area.
| Indicator | Value | Source |
|---|---|---|
| Population (2020) | 23,216 | U.S. Census 2020 |
| Land area | 3.27 sq mi | Census Gazetteer 2024 |
| Population density | ~7,100 / sq mi | Derived |
| Incorporated | 1948 | City of Millbrae |
| Housing units (2020) | 8,679 | U.S. Census 2020 |
| Median age | 43.7 | ACS 2020–24 |
Sources: U.S. Census Bureau — 2020 Decennial Census, American Community Survey (ACS) 2020–2024 5-year estimates, and 2024 Gazetteer; City of Millbrae. Decennial counts and ACS survey estimates use different methods, so they may differ slightly.
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