Census Bureau, here are the counties that had the largest population growth measured in number of people.1Harris County, Texas105,8522Miami-Dade County, Florida64,2113Maricopa County, Arizona57,4714Collin County, Texas46,6945Clark County, Nevada44,5866King County, Washington43,3987Cook County, Illinois40,0958Broward County, Florida34,6869Montgomery County, Texas34,26810Tarrant County, Texas32,79311Orange County, Florida32,38112Denton County, Texas31,38413Fort Bend County, Texas31,31414Mecklenburg County, North Carolina30,05715Bexar County, Texas29,54816Santa Clara County, California29,18817Wake County, North Carolina29,05018Polk County, Florida28,70619Pinal County, Arizona27,46720New York County, New York27,43521Riverside County, California26,38422Williamson County, Texas25,84023Los Angeles County, California25,34224Kings County, New York24,69425Palm Beach County, Florida24,574

Quote from @Clara L Trefts: Investment Info:Single-family residence buy & hold investment.

My main focus is Santa Clara County. 

In San Francisco and anywhere near Silicon Valley (Santa Clara, San Jose, San Mateo), I'd say it's a seller's market for single family homes.East of San Francisco which has more affordable homes, a nicely done renovation can get multiple offers if it's under a $1 million and in at least a decent school district.

Santa Clara prices are up about 6% and San Jose 11% (near Silicon Valley) and San Mateo County up 4.8%.

.: Irony....a year ago a machine shop owner, in Santa Clara, I've known for years passed.

I am trying to look up at, Sonoma, Solano, Santa Clara, Marin, San mateo, Contra costa, and alameda.

In Santa Clara, median sales price in 1990 was  $245,670  and in 2024 it was $1,900,000 (the AI boom was a factor, according to this data).

I think with coastal California and land constraints and regulations the appreciation will be higher even with 500,000 people that move out, there are still 400,000+ people moving in.With the Bay Area, Santa Clara, San Jose and San Mateo have surpassed home sales and prices in San Francisco because they're near Silicon Valley.

If I had a very large amount of capital I'd invest in San Jose/Santa Clara and a high risk tolerance, flipping in Silicon Valley area with an experienced partner (multiple offers by primary home buyers) or buying a multi-unit.