This is a list of properties and historic districts in Middletown, Connecticut that are listed on the National Register of Historic Places. There are 32 in the city, which is a large portion of all NRHP listings in Middlesex County. There are 81 others in the county, listed here.
The Middletown listings are:
References
National Register of Historic Places listings in Middletown, Connecticut Wikipedia(Text) CC BY-SA