d3/examples/data/census-regions.csv

1	State	State Code	Region	Division
2	Alaska	AK	West	Pacific
3	Alabama	AL	South	East South Central
4	Arkansas	AR	South	West South Central
5	Arizona	AZ	West	Mountain
6	California	CA	West	Pacific
7	Colorado	CO	West	Mountain
8	Connecticut	CT	Northeast	New England
9	District of Columbia	DC	South	South Atlantic
10	Delaware	DE	South	South Atlantic
11	Florida	FL	South	South Atlantic
12	Georgia	GA	South	South Atlantic
13	Hawaii	HI	West	Pacific
14	Iowa	IA	Midwest	West North Central
15	Idaho	ID	West	Mountain
16	Illinois	IL	Midwest	East North Central
17	Indiana	IN	Midwest	East North Central
18	Kansas	KS	Midwest	West North Central
19	Kentucky	KY	South	East South Central
20	Louisiana	LA	South	West South Central
21	Massachusetts	MA	Northeast	New England
22	Maryland	MD	South	South Atlantic
23	Maine	ME	Northeast	New England
24	Michigan	MI	Midwest	East North Central
25	Minnesota	MN	Midwest	West North Central
26	Missouri	MO	Midwest	West North Central
27	Mississippi	MS	South	East South Central
28	Montana	MT	West	Mountain
29	North Carolina	NC	South	South Atlantic
30	North Dakota	ND	Midwest	West North Central
31	Nebraska	NE	Midwest	West North Central
32	New Hampshire	NH	Northeast	New England
33	New Jersey	NJ	Northeast	Middle Atlantic
34	New Mexico	NM	West	Mountain
35	Nevada	NV	West	Mountain
36	New York	NY	Northeast	Middle Atlantic
37	Ohio	OH	Midwest	East North Central
38	Oklahoma	OK	South	West South Central
39	Oregon	OR	West	Pacific
40	Pennsylvania	PA	Northeast	Middle Atlantic
41	Rhode Island	RI	Northeast	New England
42	South Carolina	SC	South	South Atlantic
43	South Dakota	SD	Midwest	West North Central
44	Tennessee	TN	South	East South Central
45	Texas	TX	South	West South Central
46	Utah	UT	West	Mountain
47	Virginia	VA	South	South Atlantic
48	Vermont	VT	Northeast	New England
49	Washington	WA	West	Pacific
50	Wisconsin	WI	Midwest	East North Central
51	West Virginia	WV	South	South Atlantic
52	Wyoming	WY	West	Mountain