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Chesapeake Bay Watershed Population

In 2013, an estimated 17.8 million people lived in the Chesapeake Bay watershed, up from 17.7 million in 2012. Experts predict the watershed’s population will increase to 21.4 million by 2040.

2010 Population

Population (2010)

Map: Population (2010)

Date created: Aug 05 2011 / Download

This map shows population estimates within the Chesapeake Bay watershed on a county-by-county basis for the year 2010. These are actual Census Bureau population figures provided after the last decennial census (2010). However, for counties not completely within the Chesapeake Bay watershed, the population numbers were derived as a proportion of the total county based on land area.


Each person that lives in the Chesapeake Bay watershed affects the Bay ecosystem. We consume natural resources; we pollute the air, land and water; and we alter forests and wetlands to fit our needs. The health of our rivers and streams is directly tied to population growth, and the decline of the Bay is directly linked to the rise in the number of people that live in its watershed.

Long-term trend (1950-2013)

Over the last six decades, the Chesapeake Bay watershed’s population has increased 113 percent. In 1950, an estimated 8.4 million people lived in the watershed. By 2013, this number had jumped to 17.8 million.

Short-term trend (2003-2013)

Over the last decade, the watershed’s population has increased 10 percent. This is lower than the 10.3 percent increase seen in the 1990s and the 11.6 percent increase seen in the 1980s.

Change from previous year (2012-2013)

In 2013, an estimated 17.8 million (17,846,104) people lived in the Chesapeake Bay watershed, up from 17.7 million (17,713,077) in 2012.

Additional Information

Variations in population growth

Although the watershed’s population continues to rise, growth varies from state to state and region to region. For instance, an estimated 70 percent of the watershed’s population lives in Maryland and Virginia (with 5.9 million people in Maryland and 6.6 million in Virginia). And while the population of the District of Columbia is expected to rise in the foreseeable future, other watershed states are predicting slow population declines through 2030.

Related Indicators

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