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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2017
Feb. 28, 2018
Jun. 30, 2017
Document And Entity Information      
Entity Registrant Name PEOPLES BANCORP OF NORTH CAROLINA INC    
Entity Central Index Key 0001093672    
Document Type 10-K    
Document Period End Date Dec. 31, 2017    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 132,203,074
Entity Common Stock, Shares Outstanding   5,995,256  
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2017