The United States tops the list with 3,734 megawatts of capacity. Following closely are Indonesia (2,432 MW), the Philippines (1,937 MW), Turkey (1,726 MW - despite the apparent lack of volcanoes there), and Mexico (941 MW).
Despite ranking 15th, our country only generates 50 megawatts of geothermal power, significantly lower than the leading nations by two orders of magnitude.