You may find this chart and the below (a bit dated) interesting:
•
• State ranking according to survey response as to religion being an important part of peoples daily lives. (highest to lowest): * Mississippi: 85% * Alabama: 82% * South Carolina: 80% * Tennessee: 79% * Louisiana: 78% * Arkansas: 78% * Georgia: 76% * North Carolina: 76% * Oklahoma: 75% * Kentucky: 74% * Texas: 74% * West Virginia: 71% * Kansas: 70% * Utah: 69% * Missouri: 68% * Virginia: 68% * South Dakota: 68% * North Dakota: 68% * Indiana: 68% * Nebraska: 67% * New Mexico: 66% * Pennsylvania: 65% * Florida: 65% * Maryland: 65% * Ohio: 65% * Iowa: 64% * Minnesota: 64% * Illinois: 64% * Michigan: 64% * Delaware: 61% * Wisconsin: 61% * District of Columbia: 61% * Idaho: 61% * Arizona: 61% * New Jersey: 60% * Wyoming: 58% * Colorado: 57% * Hawaii: 57% * California: 57% * Montana: 56% * New York: 56% * Connecticut: 55% * Nevada: 54% * Rhode Island: 53% * Oregon: 53% * Washington: 52% * Alaska: 51% * Massachusetts: 48% * Maine: 48% * New Hampshire: 46% * Vermont: 42%. Overall nationwide mean of 65% http://www.gallup.com/poll/114022/State-States-Importance-Religion.aspx
Regionally, the South still qualifies as the most Bible-minded. The top ranking cities are all Southern cities. This includes the media markets for Knoxville, TN (52% of the population are Bible-minded), Shreveport, LA (52%), Chattanooga, TN (52%), Birmingham, AL (50%), and Jackson, MS (50%). Other markets in the top 10 include Springfield, MO (49%), Charlotte, NC (48%), Lynchburg, VA (48%), Huntsville-Decatur, AL (48%), and Charleston, WV (47%). http://cities.barna.org/americas-most-and-least-bible-minded-cities-2/
The least Bible-oriented markets include a mix of regions, but tend to be from the New England area. Easily the lowest Bible-minded scores came from Providence, RI (9%) and Albany, NY (10%). The most Bible-minded markets are five times more likely to have residents who qualify as Bible-minded than is true in these two Northeastern cities. ^
None of the cities in the bottom 10 break 20%, where even one in five people could be considered Bible-minded. The New England area is home to most of the markets in the bottom 10 Bible-minded cities, including Burlington, VT (16%), Portland, ME (16%), Hartford, CT (16%), Boston, MA (16%), Buffalo, NY (18%) and New York, NY (18%).
The remaining markets in the bottom 10 are primarily in the West and include San Francisco, CA (16%), Phoenix, AZ (17%), and Las Vegas, NV (18%). Cedar Rapids, IA (18%) being something of an outlier. ^
The Eastern United States is the only region of the country where Protestants account for less than half (44.1%) of the population. Catholics are the best represented religious tradition in this region; claiming 35.1% of the population. 5.5Baylor Institute for Studies of Religion - American Piety in the 21 Century – September 2006 . Baylor Institute for Studies of Religion - American Piety in the 21 Century – September 2006 . http://www.baylor.edu/content/services/document.php/33304.pdf
The West has the highest percentages of religiously unaffiliated people (17.6%) and people in other religious traditions (10.3%) of any U.S. Region. Baylor Institute for Studies of Religion^
According to a Barna research report issued October 11, 2010, The 10 most unchurched cities – where around four out of ten adults have not been to a religious worship service in the last six months – are San Francisco (44%); Portland, Maine (43%); Portland, Ore. (42%); Albany NY (42%); Boston (40%); Sacramento (40%); and Seattle (40%); Spokane (39%);, New York (38%); Phoenix (38%); Tucson (37%). . http://www.barna.org/faith-spirituality/435-diversity-of-faith-in-various-us-cities
The cities (measured in the Barna research as media markets) with the highest proportion of residents who describe themselves as Christian are typically in the South, including: Shreveport (98%), Birmingham (96%), Charlotte (96%), Nashville (95%), Greenville, SC / Asheville, NC (94%), New Orleans (94%), Indianapolis (93%), Lexington (93%), Roanoke-Lynchburg (93%), Little Rock (92%), and Memphis (92%). ^
73% of the populations of Charlotte and Shreveport held scripture in high regard, versus only 27% of the residents of Providence, Rhode Island (the most Catholic state) and San Francisco (the most homosexual large city). ^
64% of Birmingham and 54% of Charlotte said they strongly agreed that a person has a responsibility to share their beliefs with others, versus only 14% of residents of Providence R.I. and 17% of Bostonians agreed. ^
The highest percentages of residents who describe themselves as Christian are typically in the South, including: Shreveport LA (98%), Birmingham (96%), Charlotte (96%), Nashville (95%), Greenville, SC / Asheville, NC (94%), New Orleans (94%), Indianapolis (93%), Lexington (93%), Roanoke-Lynchburg (93%), Little Rock (92%), and Memphis (92%)
73% of the populations of Charlotte and Shreveport held scripture in high regard, versus only 27% of the residents of Providence, Rhode Island [the most Catholic state] and San Francisco [the most homosexual large city]. ^
The lowest percentages of self-identified Christians inhabited the following markets: San Francisco (68%), Portland, Oregon (71%), Portland, Maine (72%), Seattle (73%), Sacramento (73%), New York (73%), San Diego (75%), Los Angeles (75%), Boston (76%), Phoenix (78%), Miami (78%), Las Vegas (78%), and Denver (78%). Even in these cities, however, roughly three out of every four residents align with Christianity. ^
The highest percentage of souls who tended toward being atheist or agnostic were in Portland, Maine (19%), Seattle (19%), Portland, Oregon (16%), Sacramento (16%), and Spokane (16%) ^
Commitment to evangelism (agree strongly that a person has a responsibility to share their beliefs with others) saw the greatest percentage of endorsement by residents of Birmingham (64%) and Charlotte (54%), in contrast to residents of Providence (14%) and Boston (17%). ^ More