Martin Ingham Townsend was an American lawyer and politician from New York.

The Constitution of the State of New York establishes the structure of the government of the State of New York, and enumerates the basic rights of the citizens of New York. Like most state constitutions in the United States, New York's constitution's provisions tend to be more detailed and amended more often than its federal counterpart. Because the history of the state constitution differs from the federal constitution, the New York Court of Appeals has seen fit to interpret analogous provisions differently from United States Supreme Court's interpretation of federal provisions.