Arrowhead Lake is an unincorporated community and census-designated place (CDP) in Cumberland County, in the U.S. state of New Jersey. It is in the northwestern part of the county, in the northern part of Stow Creek Township. A small artificial lake is in the northwestern part of the CDP, with a residential neighborhood on its southern shore.

The community is 2 miles (3 km) northwest of Shiloh and 1 mile (1.6 km) south of Marlboro. New Jersey Route 49 forms the eastern boundary of the CDP; the road heads southeast 5 miles (8 km) to Bridgeton and northwest 11 miles (18 km) to Salem.

Arrowhead Lake was first listed as a CDP prior to the 2020 census with a population of 126.

Historical population

Census	Pop.	Note	%±
2020	126		—
U.S. Decennial Census 2020

Arrowhead Lake first appeared as a census designated place in the 2020 U.S. Census.

Arrowhead Lake CDP, New Jersey – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.

Race / Ethnicity (NH = Non-Hispanic)	Pop 2020	% 2020
White alone (NH)	104	82.54%
Black or African American alone (NH)	4	3.17%
Native American or Alaska Native alone (NH)	2	1.59%
Asian alone (NH)	2	1.59%
Pacific Islander alone (NH)	0	0.00%
Other race alone (NH)	0	0.00%
Mixed race or Multiracial (NH)	4	3.17%
Hispanic or Latino (any race)	10	7.94%
Total	126	100.00%