Kentucky is about 167 times bigger than Saint Lucia.

Saint Lucia is approximately 616 sq km, while Kentucky is approximately 102,896 sq km, making Kentucky 16,604% larger than Saint Lucia. Meanwhile, the population of Saint Lucia is ~167,122 people (4.2 million more people live in Kentucky).
Tip: This to-scale comparison of Saint Lucia vs. Kentucky uses the Mercator projection, which distorts the size of regions near the poles.