The Haemorhous mexicanus, commonly known as the House Finch, is originally native to North America. Its native range predominantly includes the western United States and Mexico, with specific regions including California, Oregon, and the Mexican Plateau.

House Finches typically inhabit open woodlands, desert grasslands, and urban areas. They are quite adaptable and have thrived in a variety of environments, including agricultural and suburban regions. These birds prefer warm, temperate climates with adequate vegetation.

In their ecological niche, House Finches play a role as seed dispersers. They primarily feed on seeds, fruits, and occasionally insects, which affects the composition and distribution of plant communities. Their adaptability to urban environments signifies a successful generalist strategy in resource utilization.