Elwood is an unincorporated community and census-designated place (CDP)[10] located within Mullica Township in Atlantic County, in the U.S. state of New Jersey.

[13] The area is served as United States Postal Service ZIP Code 08217.

[1][2] The 2010 United States census counted 1,437 people, 436 households, and 340 families in the CDP.

Of all households, 15.8% were made up of individuals and 5.7% had someone living alone who was 65 years of age or older.

[14] As of the 2000 United States Census[7] there were 1,392 people, 427 households, and 333 families living in the CDP.

16.9% of all households were made up of individuals, and 6.8% had someone living alone who was 65 years of age or older.