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Our Firm

Williams & Company, P.C. is the successor to an organization founded in 1929 by Charles A. Williams, CPA. The firm has grown into one of the leading regional firms in the Midwest, with clientele throughout the United States. The firm currently has five offices in Iowa located in Sioux City, LeMars, Onawa, Sheldon, and Spencer, and one office in Yankton, South Dakota. Williams & Company, P.C. currently has eight shareholders, eight managers and twenty professional accountants who provide audit and accounting services. We were recently recognized for being included in the 2018 Top 400 Firms by Inside Public Accounting.


We combine the experience of a large firm with the personal attention that only a small firm can provide. Our clients come back to us year after year because they know they are in good hands. We work to develop long-term successful relationships. We can help you; whether your needs are simple or complex.

All CPAs of the firm are members of the American Institute of Certified Public Accountants and CPAmerica International.

Additional memberships in the following are held by various individuals:

Iowa Society of CPAs

Nebraska Society of CPAs

South Dakota Society of CPAs

Iowa Health Care Association

Iowa Telecommunications Association

American Society of Pension Professional Actuaries

Government Finance Officers Association

National Association of Certified Valuation Analysts

National Association of Governmental Auditors

The Financial Planning Association