v3.26.1
Document And Entity Information
Apr. 21, 2026
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Apr. 21, 2026
Entity Registrant Name PRINCETON BANCORP, INC.
Entity Central Index Key 0001913971
Entity Emerging Growth Company false
Entity File Number 001-41589
Entity Incorporation, State or Country Code PA
Entity Tax Identification Number 88-4268702
Entity Address, Address Line One 183 Bayard Lane
Entity Address, City or Town Princeton
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 08540
City Area Code 609
Local Phone Number 921-1700
Entity Information, Former Legal or Registered Name N/A
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common stock, no par value
Trading Symbol BPRN
Security Exchange Name NASDAQ