List of Indiana state historical markers in Carroll County
# List of Indiana state historical markers in Carroll County

This is a list of the Indiana state historical markers in Carroll County.

This is intended to be a complete list of the official state historical markers placed in Carroll County, Indiana, United States by the Indiana Historical Bureau. The locations of the historical markers and their latitude and longitude coordinates are included below when available, along with their names, years of placement, and topics as recorded by the Historical Bureau. There are 3 historical markers located in Carroll County.

## Historical markers

| Marker title | Year placed | Location | Topics |
| - | - | - | - |
| Sycamore Row | 1963 | State Road 29, 0.5 miles south of Deer Creek 40°36′19″N 86°23′28.5″W﻿ / ﻿40.60528°N 86.391250°W﻿ / 40.60528; -86.391250﻿ (Sycamore Row) | Transportation, Nature and Natural Disasters |
| New Purchase Boundary (Treaty of St. Mary's) | 1966 | U.S. Route 421 south of the Wabash River bridge and north of South Road near Pittsburg 40°35′28″N 86°42′0″W﻿ / ﻿40.59111°N 86.70000°W﻿ / 40.59111; -86.70000﻿ (New Purchase Boundary (Treaty of St. Mary's)) | Early Settlement and Exploration, American Indian/Native American, Government Institutions |
| Wabash and Erie Canal | 1992 | Bicycle Bridge Road, 0.1 miles north of the junction of U.S. Route 421 and Indiana State Road 25 at the trailhead access and parking for Historic Delphi Trails on the western edge of Delphi 40°35′0″N 86°41′1″W﻿ / ﻿40.58333°N 86.68361°W﻿ / 40.58333; -86.68361﻿ (Wabash and Erie Canal) | Transportation, Business, Industry, and Labor |
