Catholic population and 1960 Democratic vote (non-South)

[King of Kensington]

D vote and Catholic percentage in 1952 in brackets. 

Arizona  44.4% (25%)
California  49.5% (22%)
Colorado  44.9% (17%)
Connecticut  53.7% (37%)
Idaho  46.2% (5%)
Illinois  50% (27%)
Indiana  44.6% (12%)
Iowa  43.2% (14%)
Kansas  39.1% (11%)
Maine  43% (25%)
Massachusetts  60.2% (48%)
Michigan  50.9% (22%)
Minnesota  50.6% (23%)
Missouri  50.3% (15%)
Montana  48.6% (24%)
Nebraska  37.9% (16%)
Nevada  51.2% (17%)
New Hampshire  46.6% (36%)
New Jersey  50% (37%)
New Mexico  50.2% (44%)
New York  52.5% (30%)
North Dakota  44.5% (22%)
Ohio  46.7% (19%)
Oregon  47.3% (7%)
Pennsylvania  51.1% (27%)
Rhode Island  63.6% (59%)
South Dakota  41.8% (17%)
Utah  45.2% (4%)
Vermont  41.3% (30%)
Washington  48.3% (11%)
Wisconsin  48.1% (30%)
Wyoming  45% (17%)

[King of Kensington]

The religious numbers (available at the state and county levels at different time periods) are available here:

https://www.usreligioncensus.org/report1.php?year=1952&btype=g

[King of Kensington]

I had no idea Vermont was as Catholic as New York by 1960. No wonder the GOP Yankee machine in the state started showing its first cracks with William H. Meyer's election around this time. Albert J. Gonzalez's book on the 1960 election found that anti-Catholicism affected the election patterns very heavily.

There was a particularly sharp Catholic-Protestant divide in the 1960 election (for obvious reasons) - certainly more so than in the Eisenhower era and in the LBJ landslide of 1964.