Where you live can determine how happy — or unhappy — you feel. Fremont, California, has been named the happiest city in the United States, according to a new study from WalletHub . The California city also topped the list in 2025 . One contributing factor to its ranking is that the city has the highest share of households — nearly 80% — with an income above $75,000. Five other California cities made the top 25 happiest: Irvine (No. 8), San Jose (No. 10), San Francisco (No. 17), San Diego (No.