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Commissioners of St. Mary's County

Proudly Serving Our Citizens

The legislative and executive functions of St. Mary's County Government are administered by the Commissioners of St. Mary's County (CSMC). The CSMC consist of five members who are elected to four-year terms, including a president and four district commissioners. All five members are elected at large by voters across St. Mary's County, though district commissioners must reside in the district they represent.

The current five Commissioners of St. Mary's County, seated and standing between the U.S. and Maryland flags in the Commissioner's meeting room.
Headshot of Commissioner President James R. Guy
James R. Guy
Mr. James "Randy" Guy is serving his third term as Commissioner President of the Commissioners of St. Mary's County. He was born in Leonardtown and graduated with a degree in transportation and traffic management from the Community College of the Air Force.Read more >>
Headshot of First District Commissioner Eric Colvin
Eric Colvin
First District
Eric Colvin is serving his second term as a Commissioner of St Mary's County, representing District 1. He was born and raised in Leonardtown, attending Leonardtown Elementary, Middle, and High Schools. He graduated Summa Cum Laude with Bellavance Honors from Salisbury University with dual majors in Political Science and History and a minor in Marketing.Read more >>
Headshot of Second District Commissioner Michael L. Hewitt
Michael L. Hewitt
Second District
Michael L. Hewitt is serving his third term as a Commissioner of St Mary's County, representing District 2. He was born in Maine and moved with his family to St Mary's County in 1963. He attended St Michael's Elementary School in Ridge, Esperanza Middle school and Great Mills High School. He then graduated from St Mary's College of Maryland.Read more >>
Headshot of Third District Commissioner Mike Alderson, Jr.
Mike Alderson, Jr.
Third District
Mike Alderson, Jr. is a first-term Commissioner representing District 3. He was born at Patuxent River Naval Air Station Hospital and was raised in the southern end of the county, attending Ridge Elementary, Spring Ridge Middle School, and Great Mills High School. He graduated as the Honor Man for his platoon with the Marine Corps and served with the 2nd Light Armored Infantry Battalion during Operations Desert Shield/Desert Storm.Read more >>
Headshot of Fourth District Commissioner Scott R. Ostrow
Scott R. Ostrow
Fourth District
Scott Ostrow is a first-term Commissioner representing District 4. He was born in New York City and raised in Orange County, California. He and his family moved to St. Mary's County in 2014 and now live in Lexington Park, where he is an active member of Cornerstone Presbyterian Church. He has a bachelor's degree in Business Administration with an emphasis on finance and a master's degree in Business Administration and Leadership.Read more >>

In 1634, a group of courageous voyagers traveled from their homes in England in pursuit of a new land. They landed on an island in the Potomac River with a prayer of thanks for their safe journey. St. Clement's Island is a landmark in the history of Maryland. It was here the adventurers took possession of the colony and the first Roman Catholic Mass in the English speaking colonies was offered. Learn more about our shared history

Today, St. Mary's County is home to the Naval Air Station Patuxent River. Major tenant commands include the Naval Air Systems Command Headquarters (NAVAIR), Naval Air Warfare Center-Aircraft Division (NAWCAD), and many other tenant activities known as leaders in aviation and advanced technology. Tackle the great outdoors or enjoy a bushel of crabs. By land or by sea, discover the best of the old and the new in St. Mary's County. Come explore our vibrant and bountiful community brimming with historical firsts

Contact Us

By Phone or Email

James R. Guy 301-475-4200 ext. 1361
Eric Colvin 301-475-4200 ext. 1354
Michael L. Hewitt 301-475-4200 ext. 1355
Mike Alderson, Jr. 301-475-4200 ext. 1357
Scott R. Ostrow 301-475-4200 ext. 1353

By Mail

Attn: Commissioners of St. Mary's County
Post Office Box 653
Leonardtown, Maryland 20650

In Person

Chesapeake Building
41770 Baldridge Street
Leonardtown, MD 20650

Vision: St. Mary's County will be a vibrant and friendly place to live, learn, work and play; where neighbors support neighbors and the community embraces future growth while preserving the county's rural character.

Mission: St. Mary's County Government (SMCG) will deliver high quality public services, foster opportunities for residents and businesses, and work to preserve the county's natural environment, rich heritage, and rural character.

Values: Transparency | Accountability | Exemplary Customer Service | Civility


  1. Deliver High Quality Services:
    • Robust capital improvement
    • Infrastructure investments
    • Data driven priorities
    • Enhanced partner and community engagement
    • Support programs and services for youth, families, and older adults
    • Prioritize public safety
    • Maintain balanced budget
    • Promote technological enhancements
  2. Foster Local Opportunities:
    • Support economic development
    • Achieve excellence in public education
    • Support higher education opportunities
    • Foster entrepreneurial initiatives
    • Leverage community priorities
    • Maintain low taxes
    • Support public partners
  3. Preserve Rural Character:
    • Follow Comprehensive Land Use & Land
    • Lead local conservation and preservation efforts
    • Preserve historical county assets
    • Promote county heritage
    • Protect the agricultural and aquacultural lifestyle
  4. Support & Engage Employees:
    • Provide competent Human Resources management
    • Improve employee engagement & communications
    • Prioritize training and leadership development
    • Promote and advance employee benefits