Marbury was born in Guilford, Howard County, Maryland to Reverend Ogle Marbury and Eleanora Brevitt MacKenzie Marbury. He was privately tutored as a youth, and also attended Baltimore City College and Deichmann Gymnasium School. He received his B.A. degree in 1902 from Johns Hopkins University, and his LL.B. degree from the University of Maryland School of Law in 1904.
In 1904, Marbury was admitted to the Maryland Bar and entered into private practice in Prince George's County and Baltimore. He worked with the firm of Marbury & Perlman, and later partnered with Lee Hecht.
From 1910 to 1912, Marbury served as a member of the Maryland House of Delegates. In the House, he was chairman of the Ways and Means Committee in 1912, and also as Democratic Floor Leader that same year.
Marbury worked as an attorney for the Prince George's County Commissioners from 1914 to 1918, and again from 1937 to 1941, and was also an attorney for the Prince George's County Board of Education from 1916 to 1937. He served as Assistant Attorney General of Maryland from 1916 to 1920, and briefly served in an acting capacity as Attorney General of Maryland in 1919. He was an at-large delegate to the 1920 Democratic National Convention, and chairman of the Maryland State Board of Prison Control from 1920 to 1923. He also served as City Solicitor of Laurel, Maryland from 1929 to 1941, and as President of the Maryland State Bar Association in 1946.
In 1940, Marbury served as an associate judge and chief judge of the 7th Circuit of the Prince George's County Circuit Court. He served as an associate judge of the Maryland Court of Appeals from 1941 to 1944, and as Chief Judge of that court from 1944 to 1952.
Marbury married Eliza Gardner Cronmiller (died 1955), with whom he had one daughter: Anne Tasker Ogle Marbury Oberweiser.
- Biography from the Maryland Archives
|Attorney General of Maryland (acting)
D. Lindley Sloan
|Chief Judge of the Maryland Court of Appeals
1944 - 1952