Rancho Cucamonga, located in San Bernardino County, is known for its blend of suburban comfort and urban amenities. Here are some of the best areas to live in this city:

1. Alta Loma: Known for its upscale homes and excellent schools, Alta Loma offers a quieter, more residential feel with beautiful mountain views.
2. Victoria Gardens: This area is perfect for those who enjoy a mix of residential and commercial spaces. The Victoria Gardens shopping center provides easy access to shopping, dining, and entertainment.
3. Terra Vista: A master-planned community with well-maintained parks, walking trails, and a variety of housing options.
4. Etiwanda: This neighborhood is known for its highly-rated schools and family-friendly atmosphere.
5. Deer Creek: An upscale area with larger homes and lots, offering a more secluded feel while still being close to amenities.