President Obama, who has been criticized for favoring oil and gas development over land conservation in his first term, on Monday will designate five new national monuments, according to officials briefed on the decision.

They are the First State National Monument in Delaware and Pennsylvania; the Rio Grande del Norte National Monument in New Mexico; the San Juan Islands National Monument in Washington State; Charles Young Buffalo Soldiers National Monument in Ohio and a monument commemorating Harriet Tubman and the Underground Railway in Maryland....