Colton Hall is a government building and museum in Monterey, California, United States. It was built in 1847-49 by Walter Colton, who arrived in Monterey as the chaplain on Commodore Robert F. Stockton's vessel. He remained and was named as Monterey's first alcalde (mayor) in the American Period. Colton Hall originally contained rooms downstairs for a public school and government assembly hall upstairs. It was the site of California's first constitutional convention in 1849.