Click on U.S. Census Collection, select a year, use "browse this collection" on the right:
Enumeration districts are provided, with details on locations. For instance the schedule for District 29, Bridge Street in Northampton, shows house value, education, occupation, and more:
On the "Geographies" selection tab, you may use "Address" to enter a specific location.
Click below to view a PowerPoint file of population densisty maps from the decennial Census, 1940 - 2010.