Amboy is a city in Lee County, Illinois, United States, along the Green River.

The Christian denomination Community of Christ, formerly the Reorganized Church of Jesus Christ of Latter Day Saints, had a general conference in Amboy on April 6, 1860, at which time Joseph Smith III reorganized the church founded by his father Joseph Smith, Jr.[2] Amboy had its start in the 1850s when the Illinois Central Railroad was extended to that point.

[5] Amboy was the site of an ammunition factory for World War II - The Green River Ordinance Plant.

[6] The plant is also known as the place where Vesta Stoudt first invented modern duct tape.

[7] According to the 2010 census, Amboy has a total area of 6.29 square miles (16.29 km2), all land.

There were 1,048 housing units at an average density of 832.9 per square mile (321.6/km2).