As of the census of 2010, there were 37,099 people, 16,535 households, and 10,700 families residing in the town, occupying a land area of 42.06 square miles (109 km²).
The population density was 882.0 people per square mile (340.4/km²).
There were 33,602 housing units at an average density of 798.9 per square mile (308.3/km²).

Although the town occupies most of the land area of the island, it is not coterminous with it; there is a small part near the main access road from the mainland, William Hilton Parkway, which is not incorporated into the town.
Hilton Head (the island) therefore has a slightly higher population (48,407 in Census 2000, defined as the Hilton Head Island Urban Cluster) and a larger land area (42.65 sq mi or 110.5 km²) than the town.
The Hilton Head Island-Bluffton Beaufort Metropolitan Statistical Area, which includes Beaufort and Jasper counties, had a 2012 estimated year-round population of 193,882.

The racial makeup of the town was 82.9% White, 7.5% African American, 0.2% Native American, 0.9% Asian, 0.1% Pacific Islander, 7.3% from other races, and 1.2% from two or more races.
Hispanic or Latino of any race were 15.8% of the population.

Of the 16,535 households, 18.4% had children under the age of 18 living with them, 54.7% were married couples living together, 6.8% had a female householder with no husband present, and 35.3% were non-families.
28.3% of all households were made up of individuals, and 14.0% had someone living alone who was 65 years of age or older.
The average household size was 2.23 and the average family size was 2.66.

In the town, the population was spread out, with 18% under the age of 20, 4.4% from 20 to 24, 20.4% from 25 to 44, 28.4% from 45 to 64, and 28.8% who were 65 years of age or older.
The median age was 50.9 years.
For every 100 females, there were 103.8 males.
For every 100 females age 18 and over, there were 105.5 males.

According to a 2014 estimate, the median income for a household in the town was $68,437, and the median income for a family was $85,296.
Males had a median income of $51,463 versus $36,743 for females.
The per capita income for the town was $45,116.
About 5.4% of families and 9.3% of the population were below the poverty line, including 16.9% of those under age 18 and 3.9% of those age 65 or over.
As of the census of 2010, there were 37,099 people, 16,535 households, and 10,700 families residing in the town, occupying a land area of 42.06 square miles (109 km²). The population density was 882.0 people per square mile (340.4/km²). There were 33,602 housing units at an average density of 798.9 per square mile (308.3/km²).
Although the town occupies most of the land area of the island, it is not coterminous with it; there is a small part near the main access road from the mainland, William Hilton Parkway, which is not incorporated into the town. Hilton Head (the island) therefore has a slightly higher population (48,407 in Census 2000, defined as the Hilton Head Island Urban Cluster) and a larger land area (42.65 sq mi or 110.5 km²) than the town. The Hilton Head Island-Bluffton Beaufort Metropolitan Statistical Area, which includes Beaufort and Jasper counties, had a 2012 estimated year-round population of 193,882.
The racial makeup of the town was 82.9% White, 7.5% African American, 0.2% Native American, 0.9% Asian, 0.1% Pacific Islander, 7.3% from other races, and 1.2% from two or more races. Hispanic or Latino of any race were 15.8% of the population.
Of the 16,535 households, 18.4% had children under the age of 18 living with them, 54.7% were married couples living together, 6.8% had a female householder with no husband present, and 35.3% were non-families. 28.3% of all households were made up of individuals, and 14.0% had someone living alone who was 65 years of age or older. The average household size was 2.23 and the average family size was 2.66.
In the town, the population was spread out, with 18% under the age of 20, 4.4% from 20 to 24, 20.4% from 25 to 44, 28.4% from 45 to 64, and 28.8% who were 65 years of age or older. The median age was 50.9 years. For every 100 females, there were 103.8 males. For every 100 females age 18 and over, there were 105.5 males.
According to a 2014 estimate, the median income for a household in the town was $68,437, and the median income for a family was $85,296. Males had a median income of $51,463 versus $36,743 for females. The per capita income for the town was $45,116. About 5.4% of families and 9.3% of the population were below the poverty line, including 16.9% of those under age 18 and 3.9% of those age 65 or over.
Hilton Head Island, South Carolina