Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 01, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	QNB CORP
Trading Symbol	qnbc
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		3,493,935
Amendment Flag	false
Entity Central Index Key	0000750558
Entity Filer Category	Accelerated Filer
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Small Business	true
Entity Emerging Growth Company	false