Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	001-38656
Entity Registrant Name	BANK7 CORP.
Entity Central Index Key	0001746129
Entity Incorporation, State or Country Code	OK
Entity Tax Identification Number	20-0764349
Entity Address, Address Line One	1039 N.W. 63rd Street
Entity Address, City or Town	Oklahoma City
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	73116
City Area Code	405
Local Phone Number	810-8600
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	BSVN
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 46,432,670
Entity Common Stock, Shares Outstanding		9,094,468
Auditor Name	BKD, LLP
Auditor Location	Oklahoma City, Oklahoma
Auditor Firm ID	686