what are the top districts with the most foreign born population?

[cinyc]

According to the 2010 1 year ACS Census Estimates, the ten CDs with the highest percentage of foreign-born residents are:

FL-21 (58.11%)
FL-18 (53.16%)
CA-31 (51.53%)
NY-05 (48.07%)
CA-47 (46.86%)
FL-25 (46.78%)
CA-29 (46.33%)
NY-06 (44.32%)
CA-34 (44.26%)
NY-09 (42.06%)

The ten CDs with the lowest percentage of foreign-born residents are:
KY-05 (0.60%)
WV-03 (0.78%)
OH-18 (0.95%)
MO-08 (1.14%)
OH-04 (1.19%)
PA-12 (1.22%)
WV-01 (1.23%)
OH-06 (1.35%)
MN-08 (1.50%)
PA-09 (1.58%)

[cinyc]

Does that include single district states?  I'm surprised that Wyoming wouldn't be in the bottom ten.

Yes.  Plus D.C.   

WY-AL is in the bottom 60 with 2.81% of residents foreign-born.

[cinyc]

The only state that would make the list if you threw them all in with the districts is WV at 1.3%

True.  WV-02 barely missed the bottom 10.  It has the 11th lowest percentage of foreign-born at 1.60%.