New Baltimore is a borough in Somerset County, Pennsylvania, United States. The population was 137 at the 2020 census. It is part of the Johnstown, Pennsylvania, Metropolitan Statistical Area. The first settler was Michael Riddlemoser, who built a house here in 1820, and laid out the street plan in 1829. The community was initially known as Mosersbur…New Baltimore is a borough in Somerset County, Pennsylvania, United States. The population was 137 at the 2020 census. It is part of the Johnstown, Pennsylvania, Metropolitan Statistical Area. The first settler was Michael Riddlemoser, who built a house here in 1820, and laid out the street plan in 1829. The community was initially known as Mosersburg, and was later renamed New Baltimore, after Riddlemoser's hometown. The borough was incorporated in 1874.
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