Grantham, NH demographics:
population, income, and more

Total population
3,495
0.9% year-over-year change
Median household income
$106,285/yr
-6.2% year-over-year change
Housing units
2,356
6.0% year-over-year change

Grantham population

How many people live in Grantham

Grantham is home to 3,495 residents, according to the most recent Census data. Gender-wise, 46.1% of Grantham locals are male, and 53.9% are female.

Total population
3,495
0.9% year-over-year change
Gender ratio
Male
46.1%
1,612
Female
53.9%
1,884
Value Percent YoY change
Male 1,612 46.1% 3.0%
Female 1,884 53.9% -0.8%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Grantham is 50, with the population distributed as follows: about 14.5% are children under 15, then 13% are in the 15 to 24 age group. Adults between 25 and 44 make up 15.2% of the population, while another 40.3% fall into the 45 to 64 bracket. Finally, around 16.9% are 65 or older.

Median age
50.3
Age breakdown
Under 15
14.5%
15 to 24
13%
25 to 44
15.2%
45 to 64
40.3%
Over 65
16.9%
Value Percent YoY change
Under 15 507 14.5% -0.8%
15 to 24 455 13% -13.5%
25 to 44 533 15.2% 68.1%
45 to 64 1,408 40.3% 9.2%
Over 65 592 16.9% -27.9%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Grantham, 97.7% of the population are US-born citizens, while 0.1% have gained naturalized citizenship. At the same time, 2.2% of residents are non-citizens. There’s also a share of 1.5% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.7%
Non-U.S.-born citizens
0.1%
Non-citizens
2.2%
Value Percent YoY change
U.S.-born citizens 3,415 97.7% 0.3%
Non-U.S.-born citizens 4 0.1% 0.0%
Non-citizens 77 2.2% 32.8%
Racial breakdown
White
98.5%
Black or African American
0%
American Indian and Alaska Native
0%
Asian
0%
Native Hawaiian and other Pacific Islander
0%
Two or more races
1.5%
Other
0%
Value Percent
White 3,443 98.5%
Two or more races 52 1.5%

Households in Grantham

A peek inside Grantham households

Grantham has 1,443 households, with an average of 2 members in each. Of these, 70.6% are families, while the remaining 29.4% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
1,443
12.4% year-over-year change
Average people per household
2
Non-family households
424
Family households
1,019
Value Percent YoY change
Non-family households 424 29.4% 75.2%
Family households 1,019 70.6% -2.2%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Grantham

The housing landscape of Grantham

Grantham's housing consists of 2,356 units, with 91.5% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 3.4% and offer a more compact, shared living style.

Housing units
2,356
6.0% year-over-year change
Housing types
Value Percent
1 unit, detached 2,156 91.5%
1 unit, attached 79 3.4%
5 to 9 units 90 3.8%
10 to 19 units 32 1.4%
Homes built since 2020
% year-over-year change

The age of buildings in Grantham

In Grantham, the median construction year is 1987. About 3.1% of homes were built before the 1940s, with another 2.2% going up by 1949. Most development happened in the second half of the 20th century.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 74 3.1% 10.4%
Built between 1940 and 1949 51 2.2% 1,175.0%
Built between 1950 and 1959 92 3.9% -1.1%
Built between 1970 and 1979 512 21.7% -2.9%
Built between 1980 and 1989 667 28.3% -12.0%
Built between 1990 and 1999 412 17.5% -1.2%
Built between 2000 and 2009 370 15.7% 71.3%
Built between 2010 and 2019 178 7.6% 26.2%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Grantham occupancy rates

Out of the 1,443 occupied housing units in Grantham, 99.8% are owner-occupied, while 0.2% are lived in by tenants. Meanwhile, 38.8% of all homes on the local market sit vacant.

Occupied housing units
1,443
12.4% year-over-year change
Occupancy breakdown
Renter occupied
3
Owner occupied
1,440
Value Percent YoY
change
Renter occupied 3 0.2% N/A
Owner occupied 1,440 99.8% 12.2%
Unoccupied housing units
38.8%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Grantham housing costs

Median housing costs per month
$1,414/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.

Education in Grantham

Grantham education at a glance

About 15.2% of the population in Grantham went to high school, while 19.7% pursued college studies. Another 11.9% earned an associate degree and 29.1% hold a bachelor’s. Meanwhile, 24.1% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
High school diploma 429 15.2% -19.4%
College diploma 556 19.7% 44.0%
Associate degree 336 11.9% 2.4%
Bachelor's degree 822 29.1% 0.5%
Graduate degree 682 24.1% 1.6%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Grantham

How much people earn in Grantham

The average annual household income in Grantham was $143,192 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -1% change from the previous year. At the same time, the median income stood at $106,285, reflecting a -6.2% shift over the same period.

Average household income in Grantham
$143,192/year
-1.0% year-over-year change
Median household income in Grantham
$106,285/year
-6.2% year-over-year change

Grantham income by age

In Grantham, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $159,952. Those with someone between 45 and 64 in charge, often well established professionally, earn $137,528 overall. Overall, 100% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $159,952 -36.0%
45 - 64 $137,528 -13.7%
Over 65 $63,395 4.0%

Employment in Grantham

Workforce and job types in Grantham

86.3% of the working population are employed in professional or administrative positions, while 13.7% are in hands-on or service-based jobs. Also, 14.4% run their own businesses, 38.7% are employed by private companies, and 5.9% work in the public sector.

Workforce demographics

White collar
1,603
Blue collar
254
Value Percent YoY change
White collar 1,603 86.3% 14.5%
Blue collar 254 13.7% 20.4%
Employer type
Self employees
14.4%
Private companies
38.7%
Governmental workers
5.9%
Not for profit companies
41%
Value Percent YoY change
Self employees 268 14.4% 5.5%
Private companies 718 38.7% 29.4%
Governmental workers 110 5.9% 83.3%
Not for profit companies 761 41% 2.4%

Transportation in Grantham

How people get around in Grantham

Means of transportation
Value Percent YoY change
Car 1,573 100% 11.6%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Grantham by zipcode?

Zipcode Population Number of households Median income Average income
03753 3,509 1,449 $106,285 $144,010

Explore more communities

FAQs about Grantham demographics 

What is the total population of Grantham?

Grantham has a total population of 3,495 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.9% compared to a year ago.

What is the gender ratio in Grantham?

The gender ratio in Grantham is as follows:
  • 46.1% males (1,612 residents)
  • 53.9% females (1,884 residents)

What is the median age in Grantham?

The median age in Grantham is 50.3.

What is the age distribution of the population in Grantham?

The age distribution in Grantham is as follows:
  • Under 15: 14.5% (507 residents)
  • Ages 15-24: 13% (455 residents)
  • Ages 25-44: 15.2% (533 residents)
  • Ages 45-64: 40.3% (1,408 residents)
  • Over 65: 16.9% (592 residents)

What is the racial and ethnic makeup of Grantham?

The racial and ethnic makeup of Grantham is as follows:
  • White: 98.5% (3,443 residents)
  • Black or African American: 0% ( residents)
  • American Indian and Alaska Native: 0% ( residents)
  • Asian: 0% ( residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 1.5% (52 residents)
  • Other: 0% ( residents)

What percentage of the population in Grantham are U.S.-born citizens?

U.S.-born citizens represent 97.7% of the population in Grantham.

How many housing units are there in Grantham?

There are 2,356 housing units in Grantham, reflecting a +6.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Grantham and what is the average household size?

Grantham has a total of 1,443 households, with an average of 2 people in each.

What is the median household income in Grantham?

Grantham has a median household income of $106,285, representing a -6.2% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Grantham?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 86.3% (1,603 residents)
  • Blue-collar workers: 13.7% (254 residents)

Places of employment:
  • Self-employed: 14.4% (268 residents)
  • Private companies: 38.7% (718 residents)
  • Governmental workers: 5.9% (110 residents)
  • Not-for-profit companies: 41% (761 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025