Cover Page - shares	6 Months Ended
	Jun. 30, 2023	Aug. 02, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	000-16772
Entity Registrant Name	PEOPLES BANCORP INC.
Entity Incorporation, State or Country Code	OH
Entity Tax Identification Number	31-0987416
Entity Address, Address Line One	138 Putnam Street,
Entity Address, Address Line Two	P.O. Box 738,
Entity Address, City or Town	Marietta,
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45750
City Area Code	(740)
Local Phone Number	373-3155
Title of 12(b) Security	Common Shares, without par value
Trading Symbol	PEBO
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		35,370,363
Entity Central Index Key	0000318300
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31