The Monterey Park Spirit Bus is the transportation service of Monterey Park, California, United States, providing local routes that serve the need of those commuting within the city itself or who plan on using the bus to connect with rail service to Los Angeles or surrounding suburbs.

The bus lines complement the Los Angeles County Metropolitan Transportation Authority's crosstown routes through the city.

As of June 2024, Spirit Bus operates 5 local routes and one shuttle.

Route 1 to 4 operating in loops with terminal at Monterey Park City Hall.

In addition, Spirit Bus operates Route 5 connect with regional train service at CSULA on weekdays.