It is generally bounded by the city of Lemon Grove to the East, unincorporated La Presa to the South, Encanto to the North of Imperial Ave. (at Atkins Ave,), and both Skyline and Lomita to the West.

In a memo written by Ralph Goff, Chairman of the Campo Band of Mission Indians, to Arleen Garcia-Herbst, Archeologist at Spindrift Archeological Consulting, LLC.

Jamacha is a largely residential neighborhood, with mostly single-family houses, mixed with some multi-family development, Townhomes, and two apartment complexes.

Much like the surrounding neighborhoods of Bay Terraces, Skyline, and Paradise Hills, Jamacha consists predominantly of low-density single-family homes spread across the hilly area.

The demographics for Jamacha are as follows: Hispanic-Latino is the largest group, followed by African-Americans, Asians, non-Hispanic Whites, Mixed race, and others.