Shoalwater may refer to:

• Shoalwater, Western Australia, a suburb of Perth in Western Australia
• Shoalwater Bay, a large bay on the central coast of Queensland, Australia, in use since 1966 as a military training area
• Shoalwater Bay, the original name given by settlers to Willapa Bay in Washington, United States of America
• Shoalwater Bay Tribe, a Native American tribe in western Washington state
• {{HMAS|Shoalwater|M 81}}, a minehunter operated by the Royal Australian Navy from 1987 to 2001
• Shoalwater (sidewheeler 1852), a steamboat that operated the upper Willamette River

• New York state election, 1889
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• New York state election, 1920