Source: http://www.bikesatwork.com/carfree/carfree-census-database.html
2000 census	Sorted by % non-car commuters
Population over 250k				Population 50k-250k				Together (population 50k and up)
% car-free households	% non-car commuters			% car-free households	% non-car commuters			% car-free households	% non-car commuters
56	66	New York City		28	56	Cambridge, MA		56	66	New York City
37	48	Washington DC		41	49	Jersey City, NJ		28	56	Cambridge, MA
35	47	Boston, MA		46	46	Union City, NJ		41	49	Jersey City, NJ
29	45	San Francisco, CA		20	43	Brookline, MA		37	48	Washington DC
36	36	Philadelphia, PA		23	42	Somerville, MA		35	47	Boston, MA
44	35	Newark, NJ		17	42	Berkeley, CA		46	46	Union City, NJ
29	33	Chicago, IL		26	34	Hempstead, NY		29	45	San Francisco, CA
29	31	Pittsburgh, PA		30	34	Mount Vernon, NY		20	43	Brookline, MA
16	28	Seattle, WA		15	34	Evanston, IL		23	42	Somerville, MA
36	28	Baltimore, MD		37	33	East Orange, NJ		17	42	Berkeley, CA
20	24	Minneapolis, MN		12	31	Arlington, VA		36	36	Philadelphia, PA
20	23	Oakland, CA		34	30	Passaic, NJ		44	35	Newark, NJ
27	21	New Orleans, LA		41	30	Camden, NJ		26	34	Hempstead, NY
14	20	Portland, OR		17	28	Malden, MA		30	34	Mount Vernon, NY
19	20	Honolulu, HI		17	28	White Plains, NY		15	34	Evanston, IL
24	20	Atlanta, GA		27	28	Yonkers, NY		29	33	Chicago, IL
31	18	Buffalo, NY		13	28	Oak Park, IL		37	33	East Orange, NJ
25	17	Cleveland, OH		15	27	Silver Spring, MD		29	31	Pittsburgh, PA
				7	27	Davis, CA		12	31	Arlington, VA
				30	27	New Haven, CT		34	30	Passaic, NJ
				33	27	Miami Beach, FL		41	30	Camden, NJ
				25	27	Bayonne, NJ		16	28	Seattle, WA
				10	26	Iowa City, IA		36	28	Baltimore, MD
				9	26	Boulder, CO		17	28	Malden, MA
				10	26	Ann Arbor, MI		17	28	White Plains, NY
								27	28	Yonkers, NY
								13	28	Oak Park, IL
								15	27	Silver Spring, MD
								7	27	Davis, CA
								30	27	New Haven, CT
								33	27	Miami Beach, FL
								25	27	Bayonne, NJ
								10	26	Iowa City, IA
								9	26	Boulder, CO
								10	26	Ann Arbor, MI
								20	24	Minneapolis, MN
								20	23	Oakland, CA
								27	21	New Orleans, LA
								14	20	Portland, OR
								19	20	Honolulu, HI
								24	20	Atlanta, GA
								31	18	Buffalo, NY
								25	17	Cleveland, OH