Franz S. Leichter, a New York State legislator for three decades, whose progressive views on abortion, gay unions and the decriminalization of marijuana became law here, died on June 11in Manhattan, at 92.

First as an assemblyman and then as a state senator representing the Upper West Side, Mr. Leichter was regarded as one of the Legislature’s staunchest liberals. For him, that was a badge of honor, rooted in a deep sense of injustice imbued in him during his childhood in Nazi-controlled Vienna and as a young, motherless Jewish refugee in New York. His mother, Kathe Leichter, a leading Austrian sociologist who had pressed for equal pay and job opportunities for women, was imprisoned in Nazi Germany’s Ravensbrück concentration camp and killed in 1942.

Parks were a particular passion of Mr. Leichter’s. He co-wrote legislation that transformed four miles of derelict and rotting piers below West 59th Street in Manhattan into the strips of greenery and concrete piers that compose Hudson River Park. He was also a leading advocate for building a 10-block-long park atop a water treatment plant on the Hudson River, now called Riverbank State Park. Both are among his most revered achievements.