As of 2025, the population of St. Lucia is approximately 0.18 million people (180 149), making it the 183rd most populous country in the dataset of 217 countries, with a 0.00% share of the combined total.
Over the past five years the population of St. Lucia changed by +1.07%, and over the past ten years by +3.00%. By five-year growth, St. Lucia ranks 163rd of 217 countries; in terms of momentum, growth is slowing — from +0.38% to +0.21% per year.
| Year | Population | Diff | Diff % | Share of Universe |
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