- Yager Junction
- Yaldora
- Yankee Hill
- Yankee Hill
- Yankee Jims
- Yankee Point Rock
- Yellowjacket
- Yellowjacket Place
- Yerba Buena Island
- Yermo
- Yettem
- Yokohl
- Yolano
- Yolo
- Yontocket
- Yorba Linda
- Yorkville
- Yosemite Forks
- Yosemite Junction
- Yosemite Lakes
- Yosemite Lakes Park
- Yosemite Valley
- Yosemite Village
- Yosemite West
- You Bet
- Youngstown
- Yountville
- Yreka
- Yuba City
- Yuba Pass