I needed to know the sumlevels for the American Community Survey today. I couldn't find this data anywhere online. Finally, I googled “Geographic Summary Level Census” and found the information that I needed.
Here's the information for anyone googling “American Community Survey sumlevel.”
020 Region – Four groupings of states established by the Census Bureau in 1942 for the presentation of census data.
030 Division – A grouping of States within a census geographic region, established by the Census Bureau for the presentation of census data.
040 State – the primary legal subdivision of the United States
050 County – the primary legal subdivision of every state except Alaska and Louisiana
061 Minor Civil Division – the Census Bureau produces estimates for MCDs in 20 states. These legally defined county subdivisions are known by various descriptions, including towns (in New England, New York and Wisconsin), townships, and districts.
071 MCD Place Part – incorporated places can cross MCD boundaries, therefore a place name (with the pt. following it) can appear in more than one MCD. The 071 code designates that part of a place that is within one MCD.
157 County Place Part – incorporated places can cross county boundaries, therefore a place name (with the pt. following it) can appear in more than one county. The 157 code designates that part of a place that is within one county.
162 Incorporated Place total
170 Consolidated City – An incorporated place that has combined its governmental functions with a county or subcounty entity but contains one or more incorporated places that continue to function as local governments within the consolidated government.
172 Consolidated City-Place within Consolidated City – An incorporated place or consolidated city “balance” within a consolidated city
The source of the above information is: http://www.census.gov/popest/geographic/