US ZIP Code 01603 Nativity & Citizenship Status (2024)

Approximately 26.0% of residents in US ZIP Code 01603 were born outside the United States.

The vast majority of residents, roughly 89.7%, are U.S. citizens (including both native-born and naturalized citizens).

Place of birth and citizenship status analysis for US ZIP Code 01603

Demographics Overview

74.0%

26.0%

15.6%

89.7%

**Table 1:** Comparison of total population and nativity percentages over time.
Year	Total Pop	Foreign Born	Native Born
2024	20,868	26.0%	74.0%
2023	21,034	24.6%	75.4%
2022	20,678	25.2%	74.8%
2021	20,184	24.7%	75.3%

Approximately 26.0% of residents in US ZIP Code 01603 were born outside the United States.

The vast majority of residents, roughly 89.7%, are U.S. citizens (including both native-born and naturalized citizens).