QUITO, Ecuador—Thousands of protesters on Thursday took to the streets of Ecuador’s largest city, Guayaquil, to protest against the policies of President Rafael Correa, especially new tax proposals.

The Guayaquil demonstrations, led by Mayor Jaime Nebot, were part of the third week of protests against Mr. Correa’s government. On Thursday mass protests also took place in Ecuador’s capital, Quito, and in other cities.

Television...