# List of NJ Transit bus routes (600–699)

New Jersey Transit Bus Operations, under the NJ Transit Mercer, Inc. subsidiary, as successor to Mercer Metro, operates the following routes within Mercer County, New Jersey.

## Routes

All of these routes are exact fare lines and are operated out of the Hamilton Township garage.
| Route | Terminals | Terminals | Major Streets | Notes | History |
| 600 | Trenton Transit Center | Plainsboro | Route 1 | | Former Route E |
| 601 | The College of New Jersey | Hamilton Marketplace | State Street Clinton Avenue Kuser Road | | Capital Connection route Former Route G |
| 603 | Mercer Mall | Hamilton Square | Princeton/Brunswick Pike Broad Street White Horse Avenue | Sunday Service operating as a part of a pilot program effective 4/3/21 | Additional service between Mercer Mall and White Horse available on the 613 Additional service between Downtown Trenton and White Horse available on the 409 Weekend Service extended to Hamilton Marketplace Former Route K |
| 605 | Quaker Bridge Mall | Montgomery Township | Route 1 Witherspoon Street Route 206 | Connects with Princeton MUNI for service around Princeton, and Princeton University's Tiger Transit for service around Princeton University | Former Route M |
| 606 | Princeton | Hamilton Marketplace | Harrison Street Nassau St Route 206 Greenwood Avenue/Nottingham Way Washington Boulevard | Select weekday trips also serves Hamilton Railroad Station Connects with Princeton MUNI for service around Princeton, and Princeton University's Tiger Transit for service around Princeton University | Capital Connection route Former Route P |
| 607 | Ewing | Hamilton Independence Plaza | Parkway Avenue Broad Street Lalor Street | | Former Route Q |
| 608 | Ewing | Hamilton Station | State Street Sullivan Way Sam Weinworth Road | Service extended to both Trenton-Mercer Airport, and Homefront Family Shelter in Ewing on 4/3/21 | Capital Connection route Serves Trenton-Mercer Airport Former Route S |
| 609 | Ewing | Quaker Bridge Mall | State Street Hamilton Avenue Quaker Bridge Road | Most Monday-Saturday service does not serve the New Jersey DOT; use the 619 instead Additional service available on the 619 between Ewing and Mercerville | Capital Connection route Former Route T |
| 610 | Trenton | Princeton | | School service only Princeton Middle School (1 trip P.M. only) | |
| 611 | Trenton Circulator | Trenton Circulator | Perry Street, State Street, Front Street | Weekday service only (Lunchtime service formerly provided; discontinued June 2009 due to low ridership) | Free rides for State of New Jersey employees with ID |
| 612 | Princeton Junction Rail Station | Lawrence Township Loop | Clarksville Road | Weekday Peak Hour Service only | Renumbered from 976 in June 2010. |
| 613 | Mercer Mall | Hamilton Marketplace | Princeton/Brunswick Pike Broad Street Route 130 | | Additional service between Mercer Mall and White Horse available on the 603 Additional service between Downtown Trenton and White Horse available on the 409 |
| 619 | Ewing | Mercer County Community College | State Street Hamilton Avenue Edinburgh Road | Sunday Service operated as a part of a pilot program effective 4/3/21 | Capital Connection route Additional service available on the 609 between Ewing and Mercerville |
| 624 | Pennington | East Trenton | Pennington Avenue Perry Street Clinton Avenue | No Sunday service | Route created 6/20/15 combining former 602 and 604 lines |

### Former routes

| Route | Terminals | Terminals | Main streets of travel | Notes |
| 602 | Trenton-Downtown | Pennington | Pennington Avenue | No Sunday service Saturday service extended to East Trenton via Perry Street Former Route H Became route 624 on June 20, 2015 |
| 604 | Trenton Transit Center | East Trenton | Perry Street Clinton Avenue | Weekday service only Former Route L Became Route 624 on June 20, 2015 |
| 655 | Princeton | Plainsboro | University Place Alexander Road Route 1 Scudders Mill Road | Weekdays only Served Princeton Railroad Station New route added by NJ TRANSIT May 14, 2012 Discontinued by NJ TRANSIT September 8, 2015 Also known as Health Line |