Iowa is about 235 times bigger than Saint Lucia.

Saint Lucia is approximately 616 sq km, while Iowa is approximately 144,701 sq km, making Iowa 23,390% larger than Saint Lucia. Meanwhile, the population of Saint Lucia is ~167,122 people (2.9 million more people live in Iowa).
Tip: This to-scale comparison of Saint Lucia vs. Iowa uses the Mercator projection, which distorts the size of regions near the poles.