A Middletown Avenue is found in the neighborhood(s) listed below.
/CT/Hartford_County/Wethersfield_Town/Old_Wethersfield_Historic_District.html">Old Wethersfield Hist Dist Wethersfield Town, CT National Register Historic District
/CT/New_Haven_County/North_Branford_Town/Northford_Center_Historic_District.html">Northford Center Hist Dist North Branford Town, CT National Register Historic District.
/CT/New_Haven_County/North_Branford_Town/Howd-Linsley_House.html">Howd-Linsley House North Branford Town, CT National Register of Historic Places.