I love these list and have been to all of the cities except Minneapolis, therefore would tend to agree with the below. The ratings were gathered by Walk Score a very cool website, that you can map your commute, rate your walking neighborhood and in fact real estate agents are using. (my neighborhood is rated a 5)
What is really cool is checking out 2500 cities and neighborhoods with walk scores. Even better, take a walk and pick up some trash and litter.
Here are the 10 most walkable cities of the largest 50 in the U.S.:
1. New York City
2. San Francisco
7. Washington D.C.
Here are the 10 least walkable of the 50 largest U.S. cities:
43. Kansas City
44. El Paso
47. Fort Worth
48. Oklahoma City