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About me

Serving the Cities of Mankato, St. Peter, New Ulm, Waseca, Blue Earth, Chanhassen, Chaska, Shakopee, Fairmont, and surrounding areas.


Hello, I am Jon Sarff, P.L.C. I am a former criminal prosecutor and an experienced trial and appellate court attorney with more than 30 years of trial experience. I have extensive experience in family law and criminal defense cases. I negotiate and litigate cases on behalf of individuals, government units, and corporate clients. A large portion of my firm's cases are family law cases. I have successfully represented both women and men in uncontested and contested marital dissolution proceedings and paternity files involving the following issues: custody, parenting time, child support, medical support, allocation of child care costs, division of marital assets and debt, spousal maintenance, disposition of retirement accounts, disposition of real property, and nonmarital assets. My experience in criminal law includes trial experience as a prosecutory and criminal defense attorney for individuals.


The Sarff Law office is located in Mankato, Minnesota provides with experienced legal representation at all stages of your case. Your case will never be reassigned to a less experienced trial attorney after the case is commenced. A FLAT FEE allows you to know the exact amount you will pay for legal services at the start of the case. You will not be surprised by a significant legal bill after the case is started. You will receive at the start of your case a signed Retainer Agreement which clearly states the specific Flat Fee you will be charged. You will know that you will be able to afford legal representation from an experienced trial attorney through all stages of your case including a trial.


Contact the Sarff Law Office at (507) 387-3159 to schedule a FREE initial consultation.



  • Bachelor of Arts, University of Iowa

  • Master of Arts, Finance, University of Iowa

  • Juris Doctor, University of Iowa


Bar Admissions

  • State of Minnesota

  • U.S. District Court, District of Minnesota

  • U.S. District Court, Eigth Circuit

  • U.S. District Court, Tenth Circuit

  • U.S. Court of Appeals for the Federal Circuit

  • U.S. Armed Services Board of Contract Appeals


Court and Alternative Dispute Resolution Experience

Extensive trial court and appellate experience representing clients before:

  • Minnesota District Courts

  • Minnesota Court of AppealsMinnesota Supreme Court

  • State and Federal Appellate Courts

  • Family Court

  • Juvenile Court

  • Criminal Court

  • Civil Court

  • Probate Court


Extensive Alternative Dispute Resolution experience representing clients in:

  • American Arbitration Association proceedings

  • Mediation proceedings

  • Settlement Conferences and Negotiations


Legal Experience

  • Former Criminal Prosecutor, Minnesota

  • General Counsel, Kraus-Anderson Construction and Realty Companies, MinnesotaAssistant General Counsel, University of Minnesota

  • U.S. Government, OPIC, Washington, D.C.

  • Accounting Instructor, Northern Virginia Community College

  • Arbitrator, American Arbitration Association



  • Vietnam Veteran, U.S. Army

  • U.S. Government, OPIC, Washington, D.C.



Practice areas


  1. Divorce & Separation: 20%
    18 years
  2. Child Custody: 20%
    18 years
  3. Construction & Development: 20%
    34 years
  4. DUI & DWI: 20%
    18 years
  5. Criminal Defense: 20%
    18 years



Fixed (always), Free consultation (60 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

2 total 

Are you an attorney? Endorse this lawyer

  • Beau Daniel Mcgraw

    I endorse this lawyer. Mr. Sarff was opposing counsel on a very difficult divorce case I handled. There were many complicated issues, and he was a pleasure to work with. I felt that he was extremely diligent and we worked very well together to help our respective clients get through such a difficult time in thier lives. He provided superb representation to his client. He is an excellent family law attorney.


    Beau Mcgraw Child Custody Attorney
    Relationship: Opposing Counsel on matter

  • Todd R Haugan

    I endorse this lawyer. Attorney Sarff and I were opposing counsel in a complicted divorce matter which involved several non marital issues as well as a substantial spousal maintenace issue. I found Jon to be well prepared, aggressive, yet reasonable. He tried an excellent case and was respected and liked by the court and his client.


    Todd Haugan Family Attorney
    Relationship: Opposing Counsel on matter

Contact info

Ste 210
124 E Walnut St
Mankato, MN, 56001


MNAuthorized to practice198207/31/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Certified Real Property Law SpecialistMinnesota State Bar Association1996
Special Achievement AwardU.S. Government, Washington, D.C. - OPIC1974
Special Achievement AwardU.S. Government, Washington, D.C. - OPIC1973
Work experience
TitleCompany nameDuration
City Attorney - ProsecutorCity of Eagle Lake, Minnesota1997 - 2000
Assistant General CounselUniversity of Minnesota1994 - 1995
General CounselKraus-Anderson Realty & Construction Co.1987 - 1993
Association namePosition nameDuration
American Arbitration AssociationArbitrator1982 - 1983
Minnesota State Bar Associationmember1982 - Present
Northern Virginia Community CollegeAccounting Instructor1973 - 1974
Legal cases
Case nameOutcome
B. S. v. S. S.Substantial award of child support and spousal maintence.
State v. R. M.First Degree Sexual Criminal Conduct reduced to Misdemanor Disorderly Conduct and no jail time.
State v. K. B.Dismiss Violation of Felony Probation, Stay of Imposition of Felony First Degree DWI, and no State Prison time.
See all legal cases 
Publication nameTitleDate
Minnesota Institute of Legal Education"AIA General Terms and Conditions1981
School nameMajorDegreeGraduated
University of Iowa College of LawFinanceMA - Masters1974
University of Iowa College of LawLawJD - Juris Doctor1972
University of Iowa College of LawPolitical Science & PsychologyB.A1967
Speaking engagements
Conference nameTitleDate
Continuing Legal EducationAIA General Terms and Conditions1981