As of the 2010 census, the populace was 1,735 with 47.9% being males and 52.1% being females.

According to the United States Enumeration Bureau, the town/city has a total region of 1.23 square miles (3.19 km2), of which 1.19 square miles (3.08 km2) is territory and 0.04 square miles (0.10 km2) is water. As of the census of 2010, there were 1,735 citizens , 677 homeholds, and 448 families residing in the city.

The populace density was 1,458.0 inhabitants per square mile (562.9/km2).

There were 752 housing units at an average density of 631.9 per square mile (244.0/km2).

The ethnic makeup of the town/city was 94.3% White, 1.0% African American, 0.8% Native American, 0.2% Asian, 1.0% from other competitions, and 2.7% from two or more competitions.

There were 677 homeholds of which 38.1% had kids under the age of 18 living with them, 43.7% were married couples living together, 14.8% had a female homeholder with no husband present, 7.7% had a male homeholder with no wife present, and 33.8% were non-families.

28.7% of all homeholds were made up of individuals and 13.5% had someone living alone who was 65 years of age or older.

The average homehold size was 2.55 and the average family size was 3.11.

The median age in the town/city was 35.8 years.

27.9% of inhabitants were under the age of 18; 8.2% were between the ages of 18 and 24; 26.1% were from 25 to 44; 26.2% were from 45 to 64; and 11.6% were 65 years of age or older.

The populace density was 1,495.9 per square mile (578.5/km ).

There were 760 housing units at an average density of 616.9 per square mile (238.6/km ).

The ethnic makeup of the town/city was 97.40% White, 0.33% African American, 0.22% Native American, 0.49% Asian, 0.38% from other competitions, and 1.19% from two or more competitions.

There were 719 homeholds out of which 36.0% had kids under the age of 18 living with them, 44.6% were married couples living together, 15.9% had a female homeholder with no husband present, and 34.2% were non-families.

28.5% of all homeholds were made up of individuals and 16.0% had someone living alone who was 65 years of age or older.

The average homehold size was 2.55 and the average family size was 3.09.

In the city, the populace was spread out with 29.0% under the age of 18, 8.0% from 18 to 24, 30.3% from 25 to 44, 19.2% from 45 to 64, and 13.6% who were 65 years of age or older.

The median income for a homehold in the town/city was $38,681, and the median income for a family was $42,391.

About 3.8% of families and 6.9% of the populace were below the poverty line, including 6.9% of those under age 18 and 11.5% of those age 65 or over.

Watervliet is home to six schools and the Watervliet School District.

Watervliet High School (Watervliet, Michigan) United States Enumeration Bureau.

"Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2015".

Municipalities and communities of Berrien County, Michigan, United States