Middlesex County Population

1790–2026

10,741

2026 projection

1.2% since 2020 (increase)

02K4K6K8K10K12K18001850190019502000

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.
202610,741-1000.92%
202510,841-1000.91%
202410,941+160.15%
202310,925-280.26%
202210,953+1731.60%
202110,780+1711.61%
202010,609+480.45%
201910,561-1561.46%
201810,717+1030.97%
201710,614-1361.27%

Showing 10 of 38 years.

Middlesex County Demographics

55.5median age

Median age

Female57.8 yrs
Male54.2 yrs

Adults

9,107
3,704 seniors (65+) · 41% of adults5,403 other adults

Sex

Female 50% · 5,427Male 50% · 5,420

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 108 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

$75,060median household income

Median household income

$75,060

Half of households earn more, half earn less

Median earnings

$46,724

Typical yearly pay for a worker 25 or older.

Poverty rate

7.3%

About 1 in 14 residents

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

Middlesex County Marital Status

61% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married61%62%61%
Never married17%20%14%
Divorced11%12%10%
Widowed8%4%12%
Separated3%2%3%

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