According to the Grand Lodge of Ohio
Saint John the Baptist and Saint John the Evangelist are said to be the Patron Saints of Freemasonry. Combined, they are known as ‘The Holy Saints John,’ and are prominent in Ohio’s, as well as all of Freemasonry’s, ritual and degree work. In this blog we explore the histories of each Saint, and why, as Freemasons, we often reference and celebrate them.
The early adoption of The Holy Saints’ John into Freemasonry as patron Saints provides a balance or equilibrium in Masonic thought and ritual. They are introduced in the Entered Apprentice lecture. Freemasons familiar with Preston / Webb work recognize the phrase “Erected to God and dedicated to the Holy Saints John.” While very different men with different religious practices, St. John the Baptist’s more strict and rigid moral code compliments the more philosophical and esoteric work of St. John the Evangelist.
Both June 24 and December 27 are widely accepted as remembrance and recognition days to both The Holy Saints’ John. Celebrations include feasts, processions, and formal regalia. The Holy Saints’ John are often seen as metaphorical pillars of Freemasonry, with St. John the Baptist representing the pillar beneath the Earth, and St. John the Evangelist as the pillar beneath the heavens.
Source: https://www.freemason.com/holy-saints-john/ See also: https://en.wikipedia.org/wiki/St._John%27s_Day,_Masonic_feast See also: https://everythingwhat.com/who-are-the-patron-saints-of-freemasonry
According to a Catholic source, the patron saints of masons (NOT Freemasons) are Peter, Stephen, Sebastian and Louis. No mention of either John the Baptist or John the Evangelist. Source: https://catholicsaintmedals.com/patronage/patron-of-masons/
I submit this post in support of what Ken Graham has posted. It does not seem to me that the Catholic Church has any patron saints of Freemasons.
P.S. When I posted my answer I was unaware that Ken Graham got there first.