Emergency room nurse, emergency nurse, ER nurse, ER RN, emergency room, trauma, trauma nurse, acute care nurse, registered nurse, RN, R.N., nursing, nurse, emergency, healthcare, health care, hospital AMN Healthcare Nursing Job ID #3515114. At 100,000 residents, Santa Maria is the largest city in sunny Santa Barbara County, known for its agriculture, thriving wine industry, comfortable Mediterranean climate, and unique cuisine—"Santa Maria Style BBQ" being the most famous example.