Emerald-chinned Hummingbird is resident in the highlands of Central America, from southeastern Mexico south to northern Nicaragua (Dickey and van Rossem 1938, Friedmann et al. 1950, Monroe 1968, Land 1970, Binford 1989, Howell and Webb 1995, Martínez-Sánchez and Will 2010). In Mexico its distribution extends north to central Veracruz.
The elevational range of Emerald-chinned Hummingbird is 1000-2200 m (Howell and Webb 1995, Parker et al. 1996).