According to the most recent Middlesex County Massachusetts demographics data available from the 2022 Census Bureau released in the American Community Survey in November of 2022, Figure 1 Middlesex County depicts it has a Population 2021 of 1,623,411 which is the largest of all counties in the greater Middlesex County region. Figure 3 uses the Middlesex County population data for a comparison of the population growth/population change estimates from the years 2010 to 2021 and Middlesex County Massachusetts shows an increase of 120,326 (8%).
The total Middlesex County Massachusetts greater area population percent change for all areas for the years from 2010 to 2021 is shown in Figure 4 and for Middlesex County shows it has a Population Change of 8.0% which is the third most population percent change of all other counties in the greater Middlesex County region.
Looking at the Middlesex County population density (measured as people per square mile) and providing comparisons to both the national and state average population density in Figure 5, Middlesex County Massachusetts shows it has 1,985 people per square mile which is the second most of all the counties in the metro area. The next lower population density is Norfolk County about 9.1% smaller with population density of 1,819. The county with the highest population density in the area is Suffolk County which shows a people per square mile of 13,606 ( markedly bigger). Figure 6 provides Middlesex County demographics for the overall median age for all people in the region and Middlesex County depicts it has a Median Age of 38.5 which is the second smallest when ranked by overall median age of all people of all the other counties in the surrounding region. The county with the highest overall median age of all people in the area is Rockingham County which depicts an age of 44.6 (15.8% larger).
Figure 8 illustrates the overall diversity breakdown for Middlesex County population and ethnicity groups in the area. (note: Hispanic/Latino is broken out separately in the next diagram and also the group denoted as Native ethnicity includes Native American, and Hawaiian and Other Pacific Islander.) Middlesex County Massachusetts has the largest proportion of Black population at 12.7% of the total and is ranked #1. Figure 9 shows the Middlesex County Massachusetts Hispanic (including non Hispanic whites) population household ethnicity in the region and Middlesex County depicts it has a Hispanic or Latino of 8.3% which is in the mid range of other counties in the metropolitan area.
Middlesex County Families and Marital Status Charts
Figure 11 compares the average household size using the average number of people in a family for Middlesex County households. Middlesex County depicts it has a Family Size of 3.1 which is the second smallest in order of average family size of all the other counties in the local area. The county with the highest average family size in the area is Suffolk County which depicts an average family size of 3.3 (only about 4.5% larger).
Looking at Middlesex County households that are headed by a husband and wife as a percent of all families in Figure 12, Middlesex County depicts it has a Married-couple family of 80% which is the third most husband and wife family percent of all other counties in the greater Middlesex County region. The county with the highest percent of people in a husband and wife family in the area is Rockingham County which shows a husband and wife family percent of 82% (only about 3.2% larger).
The next section of charts provide a detailed look at mothers and baby births that occurred over the past 12 months. Figure 13 shows the rate of women aged 15 to 50 years old who have given birth. Middlesex County depicts it has a Birth Rate of 4.6% which is less than most other counties in the local area. The county with the highest percent of women who gave birth in the area is Worcester County which depicts a birth rate of 5.2% (12.4% larger). Figure 14 shows the breakdown of the mother's age for all baby births that occurred in the last 12 months and has the percentage of percent of births to mothers aged 20 to 24 the second smallest as measured by percent of births to mothers aged 15 to 19 of all the other counties in the metro area at 16% of the total. Second, it has the largest proportion of percent of births to mothers aged 40 to 44 at 4% of the total and is ranked #1.
The next set of demographic data looks at the marital status for Middlesex County households which is useful for internet research. Figure 16 compares the total number of single people in each area. Middlesex County shows it has a Total Single People of 49% which is in the mid range of other counties in the metropolitan area. The county with the highest percent of people who are single for any reason in the area is Suffolk County which depicts a percent single of 65% (33.1% larger). Comparing percent of people who are single for any reason to the United States average of 50%, Middlesex County is only about 2.8% smaller. Also, in comparison with the state of Massachusetts, percent of people who are single for any reason of 52%, Middlesex County is about 5.8% smaller.
Middlesex County Citizenship Demographics Charts
Middlesex County Birthplace Demographic Charts
Figure 19 looks at the detailed country of origin demographic research for foreign-born people in this place. Click column to sort.
For comparison purposes, Figure 20 shows detailed statistic data for the entire United States. In particular, this diagram breaks down the detailed country of origin foreign-born people in the entire U.S. in order to compare with the data provided in the prior diagram which shows only for the local area. Both this diagram and the prior diagram are sorted the same way to facilitate comparison between the two. Click column to sort.
Cities marked with an asterisk ("*") should resemble a city or town but do not have their own government (i.e. Mayor, City Council, etc.) These places should be recognizable by the local community but their boundaries have no legal status. Technically these include both Census Designated Places (CDP) and Census County Divisions (CCD) which are defined by the Census Bureau along with local authorities. (For more information, see:
Census Designated Place or "CDP")
and Census County Division "CCD".)
For comparison purposes, the US national average and the state average value are provided. Additionally, the "Combined Statistical Area" or CSA is shown that is closest to the city, county, or zip code shown. A CSA is a large grouping of adjacent metropolitan areas that identified by the Census Bureau based on social and economic ties. (See: Combined Statistical Area)
Data sources - Mouse over icon in upper right corner of each chart for information.