# Ohio State Route 66

State Route 66 (SR 66) is a north–south state highway in the northwestern portion of the U.S. state of Ohio. Its southern terminus is at U.S. Route 36 (US 36) in Piqua, and its northern terminus is at US 20 in Fayette. South of Defiance it generally follows the route of the former Miami and Erie Canal.

## Route description

The portion of SR 66 between Washington Avenue in Piqua and the Miami/Shelby County line is designated as the "Cpl. Samuel F. Pearson Memorial Highway", in honor of a Piqua High School graduate who was killed at Camp Victory in Baghdad, Iraq, while serving in the Army Reserve, on October 10, 2007.

## History

* 1924 – Original route established. Originally routed from Piqua to the Michigan state line 4 miles (6.4 km) north of Fayette.
* 1931 – Truncated at Fayette; U.S. Route 127 replaced the route’s alignment from Fayette to the Michigan state line.

## Major junctions

| County | Location | mi | km | Destinations | Notes |
| Miami | Piqua | 0.00 | 0.00 | US 36 | Southern terminus; road continues as US 36 west (Spring Street south) |
| Shelby | Loramie Township | 10.78 | 17.35 | SR 48 south – Russia, Covington | Northern terminus of SR 48 |
| Shelby | Cynthian Township | 12.44 | 20.02 | SR 47 – Versailles, Sidney | |
| Shelby | Fort Loramie | 16.68 | 26.84 | SR 705 (Park Street) | |
| Shelby | Fort Loramie | 16.80 | 27.04 | SR 362 north (Elm Street) – Lake Loramie State Park | Southern terminus of SR 362 |
| Auglaize | Minster | 19.20 | 30.90 | SR 362 south (First Street) | Northern terminus of SR 362 |
| Auglaize | Minster | 19.70 | 31.70 | SR 119 east (Fourth Street) | Southern end of SR 119 concurrency |
| Auglaize | Minster | 20.71 | 33.33 | SR 119 west | Northern end of SR 119 concurrency |
| Auglaize | New Bremen | 22.75 | 36.61 | SR 274 (Monroe Street) | |
| Auglaize | Saint Marys Township | 26.80 | 43.13 | SR 219 – Montezuma, New Knoxville | |
| Auglaize | St. Marys | 30.19 | 48.59 | SR 29 west / SR 116 north (Main Street) / SR 703 west (Spring Street) | Southern end of SR 29 concurrency; southern terminus of SR 116; eastern terminus of SR 703 |
| Auglaize | St. Marys | 30.55 | 49.17 | SR 29 east (Spring Street) | Northern end of SR 29 concurrency |
| Auglaize | Noble Township | 31.34– 31.56 | 50.44– 50.79 | US 33 to SR 29 – Columbus, Celina, Fort Wayne Ind. | Interchange |
| Auglaize | Salem Township | 39.04 | 62.83 | SR 197 – Celina, Kossuth, Buckland | |
| Allen | Spencerville | 42.87 | 68.99 | SR 117 (Fourth Street) | |
| Allen | Spencer–Amanda township line | 44.97 | 72.37 | SR 81 west – Willshire | Southern end of SR 81 concurrency |
| Allen | Amanda Township | 45.21 | 72.76 | SR 81 east – Lima | Northern end of SR 81 concurrency |
| Allen | Delphos | 52.89 | 85.12 | SR 697 west (Second Street) | Southern end of SR 697 concurrency |
| Allen | Delphos | 53.12 | 85.49 | SR 190 north (Fifth Street) / SR 697 ends | Northern end of SR 697 concurrency |
| Van Wert | Washington Township | 55.38– 55.50 | 89.13– 89.32 | US 30 – Van Wert, Mansfield | Interchange |
| Putnam | Ottoville | 59.90 | 96.40 | US 224 (Third Street) / SR 189 east | Southern end of US 224 concurrency; western terminus of SR 189 |
| Putnam | Monterey Township | 60.98 | 98.14 | US 224 west – Van Wert | Northern end of US 224 concurrency |
| Paulding | Washington Township | 67.10 | 107.99 | SR 114 – Grover Hill, Cloverdale | |
| Paulding | Brown Township | 73.17 | 117.76 | SR 613 west – Melrose | Southern end of SR 613 concurrency |
| Paulding | Oakwood | 73.39 | 118.11 | SR 613 east (Walnut Street) – Continental | Northern end of SR 613 concurrency |
| Paulding | Auglaize Township | 80.46 | 129.49 | SR 637 south – Paulding | Northern terminus of SR 637 |
| Defiance | Defiance | 87.13 | 140.22 | SR 66 Truck north (Downs Street) | Southern terminus of SR 66 Truck |
| Defiance | Defiance | 88.10 | 141.78 | SR 15 / SR 18 east (Second Street) – Mercy Hospital of Defiance | Southern end of SR 15/SR 18 concurrency |
| Defiance | Defiance | 88.73 | 142.80 | SR 111 south / SR 66 Truck south (Clinton Street) / West 2nd Street | Northern termini of SR 111 and SR 66 Truck |
| Defiance | Defiance | 88.87 | 143.02 | SR 15 / SR 18 west (Session Street) | Northern end of SR 15/SR 18 concurrency |
| Defiance | Defiance | 89.67– 89.77 | 144.31– 144.47 | US 24 – Napoleon, Antwerp | Interchange; exit 26 on US 24 |
| Williams | Springfield Township | 98.71 | 158.86 | US 6 west – Edgerton | Southern end of US 6 concurrency |
| Henry | Ridgeville Township | 101.85 | 163.91 | US 6 east – Napoleon | Northern end of US 6 concurrency |
| Henry | Ridgeville Township | 102.52 | 164.99 | SR 34 – Napoleon, Bryan, Northwest State Community College | |
| Fulton | Archbold | 107.35 | 172.76 | SR 2 west (Stryker Street) | Southern end of SR 2 concurrency |
| Fulton | German Township | 108.85 | 175.18 | SR 2 east | Northern end of SR 2 concurrency |
| Fulton | German Township | 110.85 | 178.40 | US 20A east – Wauseon | Southern end of US 20A concurrency |
| Fulton | German Township | 111.97 | 180.20 | US 20A west – West Unity | Northern end of US 20A concurrency |
| Fulton | Franklin Township | 112.71 | 181.39 | I-80 / I-90 / Ohio Turnpike – Toledo, Chicago | Exit 25 on the Ohio Tpk. |
| Fulton | Fayette | 118.60 | 190.87 | US 20 (Main Street) | Northern terminus; road continues as Fayette Street |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Tolled ||||||

## SR 66 Truck

SR 66 Truck is a truck route which bypasses a low railroad bridge along SR 66 in southern Defiance. Beginning at a signalized intersection with South Jefferson Avenue (SR 66), it heads west on Downs Street through a residential neighborhood. At South Clinton Street, SR 111, SR 111 Truck becomes concurrent with SR 66 Truck and both head northwest along Deatrick Street passing a supermarket and three sets of railroad tracks at-grade. At Baltimore Street (former SR 424), the two truck routes turn northeast onto Holgate Avenue paralleling the Maumee River. After heading through a residential neighborhood of the city, the road bends to the east and transitions to West Third Street. After passing under a railroad bridge, it passes numerous businesses and city facilities before reaching SR 111 again at the intersection of Third Street and Clinton Street. While SR 111 Truck ends, SR 66 Truck continues on South Clinton Street with SR 111 for one block before ending at SR 15/SR 18/SR 66.