| Name | From | To | Branches | Notes |
|---|
| Boston and Providence Railroad | Massachusetts state line in Pawtucket | downtown Providence | East Providence Branch, Massachusetts state line in Pawtucket to Fox Point in Providence | was jointly owned with the Providence and Worcester Railroad south of Boston Switch in Central Falls |
| Providence and Worcester Railroad | Massachusetts state line in North Smithfield | downtown Providence | East Providence Branch, Valley Falls (in Cumberland) to East Providence (with a section in Massachusetts) | was jointly owned with the Boston and Providence Railroad south of Boston Switch in Central Falls |
| Rhode Island and Massachusetts Railroad | Valley Falls (in Cumberland) | Massachusetts state line in Cumberland (with a section in Massachusetts) |
| East Side Railroad Tunnel | East Providence | downtown Providence | | built by the New York, New Haven and Hartford Railroad |
| Moshassuck Valley Railroad | Woodlawn (in Pawtucket) | Saylesville (in Lincoln) | | remained independent |
| Seekonk Branch Railroad | Short line in East Providence |
| Providence, Warren and Bristol Railroad | East Providence | Bristol |
| Fall River, Warren and Providence Railroad | Warren | Massachusetts state line in Warren |
| Newport and Fall River Railroad | Massachusetts state line in Tiverton | Newport |
| Charles River Railroad | Massachusetts state line in Woonsocket | Woonsocket |
| Woonsocket and Pascoag Railroad | Woonsocket | Harrisville (in Burrillville) |
| Providence and Springfield Railroad | downtown Providence | |
| Hartford, Providence and Fishkill Railroad | downtown Providence | Connecticut state line in Coventry | Dorrance Street Branch in Providence |
| New York, Providence and Boston Railroad | downtown Providence | Connecticut state line in Westerly | South Providence Branch, Cranston Junction (in Cranston) to South Providence (in Providence) |
| Pontiac Branch Railroad | Auburn (in Cranston) | Pontiac (in Warwick) |
| Pawtuxet Valley Railroad | Pontiac (in Warwick) | Hope (in Scituate) |
| Warwick Railroad | Auburn (in Cranston) | Buttonwoods (in Warwick) | | remained independent, later became a street railway |
| Naval Air Station Quonset Point | Davisville (in North Kingstown) | Quonset Point (in North Kingstown) | | remained independent (U.S. Government owned) |
| Newport and Wickford Railroad | Wickford Junction (in North Kingstown) | Wickford (in North Kingstown) |
| Narragansett Pier Railroad | Kingston (in South Kingstown) | Narragansett Pier (in Narragansett) | | remained independent |
| Wood River Branch Railroad | Wood River Junction (in Richmond) | Hope Valley (in Hopkinton) | | remained independent |
| Westerly Granite Quarry Proprietor's Railroad | Westerly | granite quarries |
| Southern New England Railway | Massachusetts state line in Woonsocket | Providence | South Providence Branch, around the west side of Providence | never finished, built by the Grand Trunk Railway | |
