In the Neotropics, Tropical Kingbirds breed in Mexico from Sonora and southwestern Chihuahua, Tamaulipas, and Nuevo León (Howell and Webb 1995) south along both coastal slopes, the Yucatán Peninsula, and central Mexico, and then south throughout Central America. In South America, kingbirds breed in much of the lowlands east of the Andes south to central Argentina (Fjeldså and Krabbe 1990, Ridgely and Tudor 1994, Stouffer and Chesser 1998), and west of Andes south to central Peru. Tropical Kingbirds also breed on most islands off of the Middle American coast, and on Caribbean islands from the Netherlands Antilles (Aruba, Curaçao, Bonaire) east to Tobago, Trinidad, and Grenada, where they are rare and may no longer breed (Stouffer and Chesser 1998). Tropical Kingbird predominantly occurs in the lowlands, but this species is reported up to 2000 m in Costa Rica (Fitzpatrick 1983), and 3100 m in Colombia (Fjeldså and Krabbe 1990).
Tropical Kingbirds breeding in Arizona and northwestern Mexico migrate south in autumn and appear to overwinter at least as far north as central Sinaloa (Stouffer and Chesser 1998). Southern populations in South America migrate northward for the southern winter, vacating central and southern South America (see Behavior).
The breeding range may be expanding northwards (e.g., to the Tucson, Arizona, area in the 20th century, where it was first discovered nesting in 1938; Phillips 1994). The breeding range apparently expanded into Texas in the 1990s, with several observed nesting in the Brownsville area beginning in 1991 (see Stouffer and Chesser 1998). There now are regular sightings in spring and summer (April-July) in southern California, Arizona, and along the Texas Gulf Coast (eBird 2013).