South Dakota

Casey Peterson and Associates, LTD

Casey Peterson and Associates, LTD., South Dakota and Wyoming CPAs and financial advisors, is a full service accounting firm dedicated to satisfying the needs of individuals and businesses in the Black Hills of South Dakota and Northeastern Wyoming. In November of 2012, we celebrated our 35th year, marking a period of remarkable growth and inevitable change.

Their expertise as a firm of South Dakota and Wyoming focused CPAs and financial advisors is designed to make the lives of our clients simpler, easier, and more successful. The services of our Gillette and Rapid City accounting firms currently meet the needs of the following industries:

Agriculture: Farmers, ranchers; all ranges of family operations.
Construction: Builders, electricians, plumbers, etc.
Healthcare: Large and small medical services and healthcare providers.
Government: From school districts to municipalities.
Non-Profits: All shapes and sizes of not-for-profit ventures.

At Casey Peterson and Associates, they pride themselves on the long-lasting management and advice that continues to provide for this region’s businesses and individuals. Their regionally-focused South Dakota and Wyoming CPAs serve as leaders in each individual industry of specialization.

Their Core Values

The proud tradition of Casey Peterson and Associates will continue to provide our team and clients with a stable environment that embraces the highest standard of ethics, integrity, and respect. They want to be your “Trusted Advisor.”
As trusted advisors, they will provide comprehensive, knowledgeable, and confidential services to solve problems for a changing world in an innovative manner for their clients, their community, and themselves.
Casey Peterson and Associates will be a loyal advocate for their clients and will work as a team in order to better serve them and help them to develop both personally and professionally. Thereby, they’re always striving to strengthen these relationships that mean so much to our success.
They will continue to maintain a balance between responsibilities for our clients and the individual responsibilities we honor for our families.

Phone Number
Fax Number
Physical Address
909 St Joseph St, Ste 101
Rapid City, SD 57701
ZIP Code
Jason Maxwell, CPA

Jason Maxwell, CPA is a full-service CPA accounting firm serving clients throughout the Madison and eastern South Dakota area dedicated to providing his clients with professional, personalized services and guidance in a wide range of financial and business needs.

Jason Maxwell, CPA firm offers many services including business financial, personal financial, accounting, auditing and tax advisory services. As a licensed and experienced Certified Public Accountant he also serves as a consultant on management, business valuation, and estate planning issues. The core services he provides can accommodate any business or personal need.

Just as technology changes, so do new tax laws and regulations. Jason Maxwell is a Certified Public Accountant with 15 years experience in the field of accounting. He is a member of the American Institute of Certified Public Accountants and the South Dakota State CPA Society. Also as a CPA licensed with the state of South Dakota in the practice of public accounting, he is required to obtain 40 hours of education each year.

Whether you are an individual or a business owner in or around Madison, the firm of Jason Maxwell, CPA has valuable experience that can assist you with your accounting needs. He has the knowledge and experience you can trust to guide you in your financial decisions.

Website Address
Phone Number
Physical Address
112 South Egan Ave.,
Madison, SD 57042
ZIP Code
Nelson & Nelson, CPA’s

Established in 1923, Nelson & Nelson, CPA’s is devoted to helping our clients succeed and reach their financial goals.

The firm is located in Sioux Falls, South Dakota, and has clients in more than 25 states and many foreign countries. We maintain our standards of personal service by building genuine long-term relationships with clients. This individualized attention keeps our clients coming back.

Their history:

Nelson & Nelson, CPA’s is the oldest existing accounting firm established in South Dakota and continuing in active business today.

James C. Nelson founded the firm in 1923. James was the father of Wesley C. Nelson and the grandfather of Charles A. Nelson. Wes joined Nelson & Nelson, CPA’s in 1957 after graduating from the University of South Dakota. Charles Nelson graduated from the University of South Dakota and became a partner at the firm in 1984.

Wes and Chuck have upheld the integrity and personal service that James established for the firm more than 85 years ago.


American Institute of CPA’s (AICPA), South Dakota CPA Society, South Dakota Estate Planning Council, AICPA Tax Section, National Association of Tax Professionals, National Society of Tax Professionals, Siouxland Chapter of the American Payroll Association, Accountants World, Sioux Falls Chamber of Commerce, and Air Force Association.

Website Address
Phone Number
(605) 336-1988
Fax Number
(605) 336-1054
Physical Address
1701 S. Minnesota Ave.
Sioux Falls, SD 57105
ZIP Code