Grantham Flag

Grantham

County:
Sullivan County
County Seat:
No
Area (mi²):
27.217
State:
New Hampshire

Grantham is located in Sullivan County, New Hampshire. Grantham has a 2025 population of 3,484. Grantham is currently growing at a rate of 0.09% annually and its population has increased by 2.29% since the most recent census, which recorded a population of 3,406 in 2020.

The average household income in Grantham is $145,971 with a poverty rate of 0%.The median age in Grantham is 51 years: 53.5 years for males, and 50.6 years for females.

3.5K
Total Population
128
Density (mi²)
3 0.09%
Growth

Grantham Population

Grantham Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Grantham includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

White (100.0%)

Race
Population
Percentage (of total)
White3,434100%

Grantham Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Grantham's average per capita income is $75,071. Household income levels show a median of $113,510. The poverty rate stands at 0%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$159,200-
Families$134,833$164,026
Households$113,510$145,971
Non Families$60,818$66,531

$75,071

Average Income

$113,510

Median Household Income

0%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)