What are some cities in California where lots of LDS people live?
San Diego, Sacramento, Oakland, Los Angeles, Newport Beach. I used to live in San Diego, and even though there weren’t many Mormons at the companies I worked at, there were many members where I went to church. My brother and his family live in a Los Angeles suburb. Any California city which has a temple of the Church of Jesus Christ of Latter-day Saints has a good-sized population of Mormons. Here is a link below for a museum about the Mormon Battalion in Old Town, San Diego, to show a little of the history of Mormons in California. They actually ended up helping build up part of the area of San Diego.