Click through the slideshow to see most and least Christian states in the United States:

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  • Utah

    78,438 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/1/1a/Parowan_Utah_Church.jpg" target="_hplink">here</a>.

  • North Dakota

    66,950 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:Catholic_Church_in_Warsaw,_North_Dakota.jpg" target="_hplink">here</a>.

  • Alabama

    62,467 Christian adherents per 100,000 people. Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:16th_Street_Baptist_Church.JPG" target="_hplink">here</a>.

  • Louisiana

    59,598 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:St._Stephens_Episcopal_Church_(Innis,_Louisiana).jpg" target="_hplink">here</a>.

  • Oklahoma

    58,598 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:Catesby_Oklahoma_Church.jpg" target="_hplink">here</a>.

  • Mississippi

    58,342 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Mississippi_Church.jpg" target="_hplink">here</a>.

  • South Dakota

    58,212 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Methodist_Episcopal_Church_Pierre_South_Dakota.JPG" target="_hplink">here</a>.

  • Minnesota

    55,280 Christian adherents per 100,000 people. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Church_near_Flom,_Minnesota.jpg" target="_hplink">here</a>.

  • Massachusetts

    55,023 Christian adherents per 100,000 people. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Sandwich_Church,_Massachusetts.jpg" target="_hplink">here</a>.

  • Arkansas

    54,985 Christian adherents per 100,000 people. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Our_Lady_of_Perpetual_Help_Church_silhouette_altus_arkansas.jpg" target="_hplink">here</a>.

  • Nebraska

    54,776 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/b/b5/Visitation_Church_%28O'Connor%2C_Nebraska%29_church_from_S.JPG" target="_hplink">here</a>.

  • Tennessee

    54,764 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/1/1e/First_Baptist_Church_Donelson_Tennessee_04032012.JPG" target="_hplink">here</a>.

  • Rhode Island

    53,576 Christian adherents per 100,000 persons.

  • Texas

    53,525 Christian adherents per 100,000 persons.

  • Iowa

    53,403 Christian adherents per 100,000 persons.

  • Wisconsin

    52,863 Christian adherents per 100,000 persons.

  • Pennsylvania

    51,883 Christian adherents per 100,000 persons.

  • Illinois

    51,442 Christian adherents per 100,000 persons.

  • South Carolina

    51,374 Christian adherents per 100,000 persons.

  • Kentucky

    51,055 Christian adherents per 100,000 persons.

  • Idaho

    50,695 Christian adherents per 100,000 persons.

  • District of Columbia

    49,903 Christian adherents per 100,000 persons.

  • Kansas

    49,666 Christian adherents per 100,000 persons.

  • New Jersey

    49,575 Christian adherents per 100,000 persons.

  • Georgia

    49,374 Christian adherents per 100,000 persons. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Washington_(Georgia)_Presbyterian_Church.JPG" target="_hplink">here</a>.

  • Connecticut

    49,096 Christian adherents per 100,000 persons.

  • New Mexico

    49,044 Christian adherents per 100,000 persons.

  • Missouri

    48,436 Christian adherents per 100,000 persons.

  • North Carolina

    46,737 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Carolina_Baptist_Church.jpg" target="_hplink">here</a>.

  • New York

    44,488 Christian adherents per 100,000 persons. <br> Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Church_in_Rye,_New_York.jpg" target="_hplink">here</a>.

  • Indiana

    43,788 Christian adherents per 100,000 persons.

  • Ohio

    42,744 Christian adherents per 100,000 persons.

  • California

    42,430 Christian adherents per 100,000 persons.

  • Virginia

    41,304 Christian adherents per 100,000 persons.

  • Michigan

    40,186 Christian adherents per 100,000 persons.

  • Delaware

    39,575 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://commons.wikimedia.org/wiki/File:Christ_Church,_Dover,_Delaware.JPG" target="_hplink">here</a>.

  • Wyoming

    39,341 Christian adherents per 100,000 persons.

  • Maryland

    39,214 Christian adherents per 100,000 persons.

  • Montana

    37,824 Christian adherents per 100,000 persons.

  • Florida

    37,104 Christian adherents per 100,000 persons.

  • Colorado

    36,461 Christian adherents per 100,000 persons.

  • Hawaii

    36,103 Christian adherents per 100,000 persons.

  • Arizona

    35,842 Christian adherents per 100,000 persons.

  • West Virginia

    35,211 Christian adherents per 100,000 persons.

  • New Hampshire

    34,617 Christian adherents per 100,000 persons.

  • Nevada

    33,395 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/f/f2/StJoanofArcCatholicChurch_in_Las_Vegas_founded_1910.jpg" target="_hplink">here</a>.

  • Washington

    33,065 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://en.wikipedia.org/wiki/File:Methodist_Church_at_Historic_Washington_State_Park_IMG_1467.JPG" target="_hplink">here</a>.

  • Vermont

    32,954 Christian adherents per 100,000 persons.

  • Alaska

    32,810 Christian adherents per 100,000 persons. Credit: Wikimedia Commons. Original photo <a href="http://upload.wikimedia.org/wikipedia/commons/1/17/Orthodox_church_in_Seldovia%2C_Alaska.jpg" target="_hplink">here</a>.

  • Oregon

    30,101 Christian adherents per 100,000 persons.

  • Maine

    27,098 Christian adherents per 100,000 persons.

A study measuring religious bodies in the United States called the, “2010 U.S. Religious Census: Religious Congregations & Membership Study (RCMS)” was recently released by the Association of Statisticians of American Religious Bodies (ASARB). The most comprehensive study of its kind, it provides detailed county-by-county information on congregations, members, adherents and attendance for 236 different faiths groups. (The survey differentiates between specific denominations within the same tradition.)

The researchers found Utah to be the most Christian* state with around 78 percent of population identifying as Christian adherents. The researchers found Maine to be the least Christian state with only about 27 percent identifying as Christian adherents.

The researchers define adherents to be those with an affiliation to a congregation including children, members and attendees who are not members, and believe that the adherent measure is the most complete and comparable across religious groups. Congregations are defined as groups of people who meet regularly at a pre-announced time and location.

More than 150.6 million Christian adherents and 344,894 congregations were reported across the country. It is noteworthy that less than 50 percent of of the nation's population identified as Christian adherents. With close to 15.8 million Christian adherents, California reported the highest number of Christian adherents, whereas Vermont reported the lowest -- only 200,000 identified as Christian adherents. Around 10 percent of the nation's Christians reside in California. With 27,248 congregations, Texas reported the highest number of congregations in a state, whereas District of Columbia reported the lowest with 566.

As illustrated in the map below, states where more than 55 percent identified as Christian adherents were in the South and Midwest. States where less than 36 percent identified as Christian adherents were in the West and Northeast. This pattern closely reflects where the most religious cities in the United States are located.

most least christian state

Bibliography:
Grammich, Clifford, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley, and Richard H. Taylor, 2012. 2010 U.S. Religion Census: Religious Congregations & Membership Study. Association of Statisticians of American Religious Bodies.

*Christians include Mormons and Unitarians / Universalists who self-identify as Christians.

Click through to see a list of most and least religious states in the United States as reported by Gallup:

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  • #1: Mississippi (59 percent)

  • #2 Utah (57 percent)

  • #3 Alabama (56 percent)

  • #4 Louisiana (54 percent)

  • #5 Arkansas (54 percent)

  • #6 South Carolina (54 percent)

  • #7 Tennessee (52 percent)

  • #8 North Carolina (50 percent)

  • #9 Georgia (48 percent)

  • #10 Oklahoma (48 percent)

  • #51 Vermont (23 percent)

  • #50 New Hampshire (23 percent)

  • #49 Maine (25 percent)

  • #48 Massachusetts (28 percent)

  • #47 Alaska (28 percent)

  • #46 Oregon (30 percent)

  • #45 Nevada (30 percent)

  • #44 Washington (30 percent)

  • #43 Connecticut (31 percent)

  • #42 District of Columbia (32 percent)

  • #42 New York (32 percent)

  • #42 Rhode Island (32 percent)