Written by Acorn Sales Company, manufacturing stamps and seals since 1964 · Reviewed by Holly R, VP of Sales and Marketing at Acorn Sales, against no Ohio board regulates professional geologists and Ohio Rev. Code tit. 47 (no geology chapter) on 21 September 2026 · Updated 21 September 2026
Ohio does not license, register or certify professional geologists, and the check takes one pass through the statute book. Ohio Revised Code Title 47, Occupations and Professions, runs from chapter 4701 to chapter 4799 and carries chapters for accountancy, architects, attorneys, physicians, professional engineers and professional surveyors, veterinarians and dozens more. There is no chapter for geology. Chapter 4733 is titled Professional Engineers and Professional Surveyors, and its thirty nine sections regulate those two professions only.
Ohio is unlike most of the other large states on this question. California licenses professional geologists and certified specialty geologists with a seal at 16 CCR section 3008, Texas licenses professional geoscientists, New York gives geologists the same seal design as engineers and land surveyors at 8 NYCRR section 68.13, Pennsylvania registers them with Design C at 49 Pa. Code section 37.58, Illinois licenses them with a one and three quarter inch seal, and Florida licenses them under chapter 492. Ohio does not.
Nothing is prescribed, so your stamp is a design decision and Acorn will cut it to whatever you want on it. The one construction to avoid is the lookalike: a circular device reading Professional Geologist, State of Ohio corresponds to no Ohio credential and borrows the annular form Ohio Administrative Code rules 4703-3-01 and 4703:1-3-01 prescribe for registered architects and landscape architects. Put your own name, your firm name, and any credential you actually hold, named with the state that issued it, and leave off any Ohio-issued title.
Ohio geologist seal requirements at a glance
| Requirement | Ohio rule | Source |
|---|---|---|
| Seal required | Not licensed here | Ohio Rev. Code tit. 47 (no geology chapter) |
| Required elements | No Ohio geologist credential exists and No seal is prescribed | Ohio Rev. Code ch. 4733 |
| Size and shape | No size is prescribed, because no seal is prescribed. | Ohio Admin. Code 4703-3-01(A), 4703:1-3-01(A) |
| Device allowed | Not applicable. | Ohio Admin. Code 4703-3-01(A), 4703:1-3-01(A) |
| Signature and date | Not applicable. | Ohio Admin. Code 4733-23-01(A) |
| What must be sealed | Not applicable. | Ohio Rev. Code § 4733.14 |
| Electronic seal | Not applicable. | Ohio Admin. Code 4703-3-01(D), 4703:1-3-01(C), 4733-23-01(D) (none applicable to geology) |
| Renewal and lapse | Not applicable. | Ohio Rev. Code §§ 4703.12(A), 4703.36, 4733.15(A) (none applicable to geology) |
| Firm requirements | Not applicable. | Ohio Rev. Code §§ 4703.18(L), 4703.36(D), 4733.16 (no geology equivalent) |
| Regulator | No Ohio board regulates professional geologists | Ohio Rev. Code tit. 47 (Occupations-Professions), chapter listing from the official Ohio Laws site, which contains no geology chapter |
Is a seal required in Ohio?
Ohio does not license, register or certify professional geologists, so no Ohio geologist seal exists and no Ohio authority prescribes one. Ohio Revised Code Title 47, Occupations and Professions, carries every Ohio professional licensing chapter from 4701 to 4799 and has no chapter for geology. Ohio Revised Code chapter 4733 is titled Professional Engineers and Professional Surveyors, and its thirty nine sections, from 4733.01 through 4733.99, regulate those two professions and no others. Geological work in Ohio is performed without a state license, and where a project requires a sealed document it comes from the professional engineer, professional surveyor or architect of record.
What must appear on the seal
- No Ohio geologist credential exists
- No seal is prescribed
There is nothing to make optional. Ohio Revised Code section 4733.14 and Ohio Administrative Code 4733-23-01(A) prescribe the legends Registered Professional Engineer and Registered Professional Surveyor. Ohio Administrative Code rule 4703-3-01(A) prescribes registered architect and rule 4703:1-3-01(A) prescribes landscape architect. Geologist appears in none of the four. A die cut with that legend and the words state of Ohio would correspond to no Ohio credential and would imitate the form of words Ohio reserves for four that exist.
Size and shape
No size is prescribed, because no seal is prescribed. The only Ohio design seal dimensions in the Administrative Code are the two inch circle with a one and three eighths inch concentric circle for registered architects at rule 4703-3-01(A) and for landscape architects at rule 4703:1-3-01(A). Professional engineers and professional surveyors have no prescribed size under Ohio Administrative Code 4733-23-01. None of these reaches geology. Checked Ohio Revised Code Title 47, ch. 4733 in full, and Ohio Administrative Code agencies 4703, 4703:1 and 4733.
Embosser, rubber stamp or digital
Not applicable. No device is authorized because no credential exists. An Ohio geologist who wants an identification block for reports can carry a plain typographic name, degree and business block, but it should not be built as a circular seal carrying the words state of Ohio, which is the construction Ohio prescribes for registered architects and landscape architects.
Signing and dating
Not applicable. Ohio prescribes no signature or dating duty for geologists because it regulates no geology credential. Where an Ohio geological report supports engineering or surveying work product, the signature and date duty that attaches is the registrant’s under Ohio Administrative Code 4733-23-01(A), which pairs the stamped seal with a signature and date, or a computer generated seal with an electronic signature and date.
Ohio is one of the states where a geologist has no seal to buy
The check takes one pass through Ohio Revised Code Title 47. It runs from chapter 4701 to chapter 4799 and contains a chapter for accountancy, one for architects, one for attorneys, one for physicians, one for professional engineers and professional surveyors, one for veterinarians and dozens more. There is no chapter for geology. Chapter 4733 is titled Professional Engineers and Professional Surveyors, and its thirty nine sections regulate those two professions only.
Which documents must be sealed
Not applicable. Ohio Administrative Code 4733-23-01(A) requires a seal on plans, specifications, plats, reports and all other engineering or surveying work product issued by a registrant, so a geological report that forms part of a registrant’s issued work product is covered by that registrant’s duty rather than by any geologist duty. A geological report standing on its own carries no Ohio seal.
Electronic and digital seals
Not applicable. Ohio’s electronic sealing rules are Ohio Administrative Code 4733-23-01(D) for engineers and surveyors, rule 4703-3-01(D) for architects and rule 4703:1-3-01(C) for landscape architects. Each governs an electronic seal belonging to an Ohio credential. There is no geology counterpart because there is no geology credential.
Renewal, lapse and retirement
Not applicable. Nothing lapses because nothing is issued. For comparison, Ohio engineer and surveyor registration expires biennially on the last day of December under Ohio Revised Code section 4733.15(A), an architect certificate runs to the last day of December of the odd numbered year next succeeding issuance under section 4703.12(A), and landscape architect registration runs to the last day of December of each even numbered calendar year under section 4703.36.
Firm requirements
Not applicable. Ohio issues certificates of authorization to engineering and surveying firms under Ohio Revised Code section 4733.16, to architectural firms under section 4703.18(L) and to landscape architecture firms under section 4703.36(D). There is no geology firm certificate because there is no geology credential to authorize.
What to check before you order
There is no Ohio geologist seal to order, because Ohio issues no geology credential. If you want an identification block for your reports, keep it plainly typographic with your name and business name. Do not order a circular device carrying the words state of Ohio in an annular ring, because that construction is prescribed for registered architects and landscape architects and a lookalike invites a complaint. If your geological work forms part of engineering or surveying work product, the seal, signature and date come from the Ohio registrant who issues that work product.
Browse geologist stamps and seals.
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Frequently asked questions
Does Ohio require a geologist to have a seal?
No, and it could not, because it issues no geology credential. Title 47 has no geology chapter, and chapter 4733 covers professional engineers and professional surveyors and no one else. With no credential there is no number, no legend and no sealing duty.
Which legends does Ohio actually reserve?
Four. Ohio Revised Code section 4733.14 and Ohio Administrative Code 4733-23-01(A) prescribe Registered Professional Engineer and Registered Professional Surveyor, rule 4703-3-01(A) prescribes registered architect, and rule 4703:1-3-01(A) prescribes landscape architect. Geologist appears in none of them, so a die cut with that legend and the words state of Ohio corresponds to no Ohio credential while imitating the form of words Ohio reserves for four that exist.
What can I put on an Ohio geologist stamp?
Whatever is true of you. A plainly typographic block with your name, your degree if you want it, your business name and contact details reads well and claims nothing. Any credential you actually hold can be named with the state that issued it, which is accurate and carries no implication about Ohio.
What should I keep off it?
The circular annular construction carrying the words state of Ohio. Rules 4703-3-01(A) and 4703:1-3-01(A) prescribe that form for registered architects and landscape architects at two inches with a one and three eighths inch concentric circle, and a geology lookalike invites a complaint even though geology itself is unregulated here.
What size and shape should it be?
Any size and any shape, because no geology rule exists. The only Ohio design seal dimensions in the Administrative Code are the architect and landscape architect figures above; professional engineers and professional surveyors have no prescribed size under rule 4733-23-01. None of that reaches you.
Who seals geological work in Ohio?
The engineer or surveyor whose work product includes it. Ohio Administrative Code 4733-23-01(A) requires a seal on plans, specifications, plats, reports and all other engineering or surveying work product issued by a registrant, paired with a signature and date, or a computer generated seal with an electronic signature and date. A geological report standing on its own carries no Ohio seal.
Does Ohio set an electronic sealing standard I should follow?
Not one that reaches you. Ohio’s electronic sealing rules are 4733-23-01(D) for engineers and surveyors, 4703-3-01(D) for architects and 4703:1-3-01(C) for landscape architects, and each governs an electronic seal belonging to an Ohio credential. There is no geology counterpart because there is no geology credential.
Will an Ohio agency accept my geologist stamp?
Not in place of a registrant’s seal. Any device an Ohio geologist uses is an identification stamp rather than a professional seal. Where a project requires a sealed document, it comes from the professional engineer, professional surveyor or architect of record.
Does anything about my stamp expire in Ohio?
Nothing lapses because nothing is issued. For comparison, Ohio engineer and surveyor registration expires biennially on the last day of December under section 4733.15(A), an architect certificate runs to the last day of December of the odd numbered year next succeeding issuance under section 4703.12(A), and landscape architect registration to the last day of December of each even numbered year under section 4703.36. None of those cycles touches you.
Does an Ohio geology firm need a certificate of authorization?
No. Ohio issues certificates of authorization to engineering and surveying firms under section 4733.16, to architectural firms under section 4703.18(L) and to landscape architecture firms under section 4703.36(D). There is no geology firm certificate because there is no geology credential to authorize.
