Where Our Data Comes From
Primary Sources
Our team of experts has years of experience in the field of population research and analysis. We are committed to providing accurate and up-to-date information to our users.
Our team of experts has years of experience in the field of population research and analysis. We are committed to providing accurate and up-to-date information to our users.
United Nations
US Census Bureau
American Community Survey
Pew Research Center
Update Frequency
We continuously update our datasets and apply statistical models to estimate figures where official data is unavailable.
How We Estimate Populations
When direct population counts aren't available, we use statistical models and trend analyses based on:
Recent Census Data & Projections
Birth & Death Rate Models
Data Limitations and Methodology
Understanding the Nuances of Population Data
Population statistics are a powerful tool, but they’re not always perfect. We continuously strive to handle data gaps, inconsistencies, and estimations to provide the most reliable figures possible.
Governments and institutions strive for accuracy, but real-world challenge, such as migration, conflict, and underreporting, can create discrepancies in population figures. At World Population Review, we acknowledge these limitations and apply rigorous methods to ensure our data remains as reliable as possible.
Factors That Affect Population Data Accuracy
Outdated Census Reports
Many countries conduct censuses only once per decade, meaning figures may not reflect recent demographic shifts.
Political & Reporting Biases
Some governments underreport or overreport populations for political, economic, or social reasons.
Incomplete or Missing Data
In regions with limited infrastructure, accurate counts may not be available, requiring statistical modeling.
Differing Definitions
Concepts like "urban population" or "household size" can vary by country, affecting global comparisons.