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with its last spurt of geographical growth in 1918, Baltimore reached a total land mass of 80.34 square miles, or as of the 1920 census when the city held over half the state's population, 9,134 people per square mile.  Ten years before in  1910, when it contained 43% of Maryland's population, an even more geographically compact city held 1735 people per square mile. In 1910 the rest of the State averaged 75 people per square mile and in 1920, 73 people per square mile. Compiled from U. S. Bureau of the Census statistics and from a document packet “The Political and Human Geography of Baltimore City: An Overview, 1729-1992,” Maryland State Archives.