Matamoras is an unincorporated community in the northeast portion of Harrison Township, Blackford County, in the U.S. state of Indiana. Matamoras is Blackford County's oldest community, although it was not the first to be platted.
Matamoras is located on the Salamonie River, less than one mile east of Montpelier.
It was likely named after Matamoros, Mexico, a battleground in the MexicanâÂÂAmerican War.