- Yaeyama Islands, Ryukyu Islands, Okinawa Prefecture1 objects
- Yamagata Prefecture, South Tohoku, Tohoku region1 objects
- Yirrkala, Northeast Arnhem Land, Northern Territory1 objects
- Yokohama, Kanagawa Prefecture, South Kanto7 objects
- Yolo County, California15 objects
- Yosemite, Tuolumne County, California2 objects
- Yucatán peninsula, Mexico4 objects
- Yucatán, Mexico4 objects
- Yukon Kuskokwim Delta2 objects
- Yukon River, Yukon, Yukon-Koyukuk Borough3 objects
- Yukon Territory, Canada12 objects
- Yukon, Yukon-Koyukuk Census Area, Alaska88 objects
- Yukon-Koyukuk Census Area, Alaska322 objects
- Yuma County, Arizona18 objects
- Yuma Valley, Yuma County, Arizona18 objects
- Yuma, Yuma Valley, Yuma County, Arizona18 objects