Middlesex County Population

1790–2026

885.05K

2026 projection

2.8% since 2020 (increase)

0200K400K600K800K1M18001850190019502000

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Middlesex County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026885,050+1,7150.19%
2025883,335+1,7150.19%
2024881,620+8,3390.95%
2023873,281+8,7291.01%
2022864,552+2,5870.30%
2021861,965+7170.08%
2020861,248+36,8544.47%
2019824,394-1,2830.16%
2018825,677-1,2950.16%
2017826,972+1,6740.20%

Showing 10 of 38 years.

Middlesex County Demographics

39.5median age

Median age

Female40.4 yrs
Male38.7 yrs

Adults

684,210
140,558 seniors (65+) · 21% of adults543,652 other adults

Sex

Female 50.3% · 438,397Male 49.7% · 432,893

Population by age

MaleFemale85+ years, male: 4,93785+ years, female: 10,49880–84 years, male: 7,27580–84 years, female: 9,36375–79 years, male: 11,56175–79 years, female: 13,61170–74 years, male: 17,55770–74 years, female: 19,44465–69 years, male: 21,75165–69 years, female: 24,56160–64 years, male: 26,49260–64 years, female: 27,55955–59 years, male: 28,89855–59 years, female: 29,25850–54 years, male: 29,08250–54 years, female: 28,65345–49 years, male: 29,09145–49 years, female: 28,21640–44 years, male: 31,78040–44 years, female: 30,07735–39 years, male: 30,04135–39 years, female: 29,60630–34 years, male: 29,51230–34 years, female: 28,85825–29 years, male: 27,17825–29 years, female: 27,04620–24 years, male: 28,42220–24 years, female: 27,68915–19 years, male: 30,91415–19 years, female: 29,40610–14 years, male: 28,32410–14 years, female: 27,3705–9 years, male: 26,2635–9 years, female: 24,4630–4 years, male: 23,8150–4 years, female: 22,71985+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–410K10K20K20K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 8,713 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Middlesex County Income

$111,549median household income

Median household income

$111,549

Half of households earn more, half earn less

Median earnings

$64,998

Typical yearly pay for a worker 25 or older.

Poverty rate

8.6%

About 1 in 12 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Middlesex County Marital Status

52% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married52%54%50%
Never married34%37%31%
Divorced8%6%9%
Widowed5%2%8%
Separated2%1%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year