The 1930 Maryland attorney general election was held on 4 November 1930 in order to elect the attorney general of Maryland. Democratic nominee William Preston Lane Jr. defeated Republican nominee David A. Robb, Socialist nominee William A. Toole, Labor nominee Word H. Mills and Communist nominee Isidore Samuelson. Incumbent attorney general Thomas H. Robinson had initially been nominated on the Democratic ticket to run for a third term, but died on 12 October 1930. So William Preston Lane Jr. was nominated in his stead for the Democratic ticket.
General election.
On election day, 4 November 1930, Democratic nominee William Preston Lane Jr. won the election by a margin of 85,198 votes against his foremost opponent Republican nominee David A. Robb, thereby retaining Democratic control over the office of attorney general. Lane was sworn in as the 31st attorney general of Maryland on 3 January 1931.
Results.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
References.
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