South Bay may refer to:
In the United States:
- South Bay (San Francisco Bay Area), subregion of the San Francisco Bay Area
- South Bay, Los Angeles, region of Los Angeles County
- South Bay, former name of Fields Landing, California
- South Bay, San Diego, region of San Diego County
- South Bay, Florida, city in Florida
- South Bay (Boston), filled-in former bay in Boston, Massachusetts
- South Bay, Boston, planned development in Boston, Massachusetts
- South Bay (Texas), bay in the Laguna Madre in Texas separated from the Gulf of Mexico by Brazos Island
- Great South Bay on Long Island, New York
In the People's Republic of China:
- South Bay, Hong Kong
- Nam Wan on Tsing Yi Island, Hong Kong ("Nam Wan" literally means South Bay)
- Tai Nam Wan on Tsing Yi Island, Hong Kong ("Tai Nam Wan" literally means Great South Bay)
- Nam Van on the Macau Peninsula, an artificial lake ("Nam Van" literally means South Bay)
In Canada:
- South Bay (Nunavut)
In Antarctica:
- South Bay (Doumer Island)
- South Bay (Livingston Island)
Famous quotes containing the words south and/or bay:
“...I always said if I lived to get grown and had a chance, I was going to try to get something for my mother and I was going to do something for the black man of the South if it would cost my life; I was determined to see that things were changed.”
—Fannie Lou Hamer (1917–1977)
“The very dogs that sullenly bay the moon from farm-yards in these nights excite more heroism in our breasts than all the civil exhortations or war sermons of the age.”
—Henry David Thoreau (1817–1862)