Princeton, New Jersey, features an ecological profile consistent with an Appalachian Oak (104) vegetation type, which falls within the Eastern Hardwood Forest (25) form, according to the A.W. Kuchler U.S. potential natural vegetation classifications. This indicates a robust ecosystem characterized by a mix of deciduous trees, which plays a crucial role in maintaining the region's biodiversity.

The demographic landscape of Princeton has evolved over the years. According to the 2010 United States Census, the combined population of Princeton Borough and Princeton Township was 28,572. By 2020, this number had increased to 30,681, reflecting a 7.4% growth. However, estimates for 2023 suggest a slight decline to 30,289, marking a 1.3% decrease from the previous count.

As per the website Data USA, Princeton currently boasts a population of approximately 30,168, with about 85% identifying as U.S. citizens. The town's ethnic composition includes 20,393 White residents (67.6%), 4,636 Asian residents (15.4%), 2,533 Hispanic residents (8.4%), 1,819 Black residents (6.03%), and 618 individuals identifying as Two or more races (2.05%).

Linguistically, Princeton is quite diverse. The most commonly spoken foreign languages include Chinese (1,800 speakers), Spanish (1,429 speakers), and French (618 speakers). Additionally, Princeton has a notable number of speakers of Scandinavian languages (425 speakers), Italian (465 speakers), and German (1,000 speakers), indicating a rich tapestry of cultural influences.

In summary, Princeton’s ecology, marked by its unique vegetation types, alongside its diverse demographic profile, underscores the town’s blend of natural beauty and human diversity. This combination enhances the community's character and contributes to its vibrancy.