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South Monrovia Island

South Monrovia Island is a census-designated place in Los Angeles County, California. It sits at an elevation of 384 feet (117 m). It is bounded to the west and north by Monrovia, to the east by Duarte, and to the south by Irwindale. The 2010 United States census reported that South Monrovia Island's population was 6,777.

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The House of Highways