The trips will bring O'Malley, who is considering a bid for president, to activists in both states this spring.
In Wisconsin, a swing state, O'Malley will be the keynote speaker at an annual gala of Democrats on April 12. A flier released Thursday advertises O'Malley as "a true progressive and results-oriented leader."
The governor will also be in Los Angeles on March 8 to be one of several public officials addressing roughly 3,000 California Democrats at that state's party convention.
O'Malley, who is term-limited, has traveled out-of-state extensively over the past three years during a two-year stint as chair of the Democratic Governor's Association and one-year turn as its finance chair.
In the past year, the governor has traveled to several states crucial to any successful presidential bid: the early primary states of South Carolina and New Hampshire, as well as Ohio and Florida. He has also campaigned for other Democrats or headlined Democratic events in Texas, New Jersey and New York.