Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 10, 2022	Jun. 30, 2021
Document Information [Line Items]
Entity Central Index Key	0000083350
Entity Registrant Name	RESERVE PETROLEUM CO
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2021
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	000-08157
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	73-0237060
Entity Address, Address Line One	6801 Broadway Ext., Suite 300
Entity Address, City or Town	Oklahoma City
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	73116-9037
City Area Code	405
Local Phone Number	848-7551
Title of 12(g) Security	COMMON STOCK ($0.50 PAR VALUE)
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	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 13,875,974
Entity Common Stock, Shares Outstanding		156,173
Auditor Name	HoganTaylor LLP
Auditor Location	Oklahoma City, Oklahoma
Auditor Firm ID	483