Census Data API: FIPS Geographies in /data/2009/acs5/geography

Reference Date	Geography Level	Geography Hierarchy	Limit
23 items
N/A	010	us
N/A	020	region
N/A	030	division
N/A	040	state
N/A	050	state› county
N/A	060	state› county› county subdivision
N/A	140	state› county› tract
N/A	150	state› county› tract› block group
N/A	160	state› place
N/A	250	american indian area/alaska native area/hawaiian home land
N/A	310	metropolitan statistical area/micropolitan statistical area
N/A	320	state› metropolitan statistical area/micropolitan statistical area
N/A	330	combined statistical area
N/A	340	state› combined statistical area
N/A	350	new england city and town area
N/A	400	urban area
N/A	500	state› congressional district
N/A	610	state› state legislative district (upper chamber)
N/A	620	state› state legislative district (lower chamber)
N/A	795	state› public use microdata area
N/A	950	state› school district (elementary)
N/A	960	state› school district (secondary)
N/A	970	state› school district (unified)