Bolivar (/ˈbɒlɪvər/, rhymes with "Oliver") is a borough in Westmoreland County, Pennsylvania, United States.

Bolivar is located on the northern border of Fairfield Township, along the Conemaugh River.

The first settlers arrived in Bolivar about the year 1829 and settled between Tubmill Creek and the Conemaugh River.

The north side of the Conemaugh was a very desirable location for new construction of brickyards due to the completion of the Western Pennsylvania Railroad from Blairsville to Bolivar, and the close proximity to coal and clay.

The Robinson Brothers also constructed a brickyard, and it is the only one in existence at the present time, being known as Garfield Refractories Co.

The Bolivar School was constructed of brick made from the Enamel Works.

B. Hammond got control of the five brickyards in Bolivar and several in Clearfield County just before the start of the 20th century, and a rapid expansion took place.

Pipes were laid under the streets for central heating, but the dream was never realized.

A panic took place in 1902, the bank failed (the depositors were paid in full later) and the brickyards were forced into receivership.

The Lincoln Brickyard enjoyed a brief period of prosperity under the leadership of Lorenzo Mumford.

Bolivar has lost six brickyards, two large coal companies, restaurants, flour and feed mill, railroad station, express station, two banks, lumber yard, opera house, movie house, dentist office, The Bolivar News, Cornet Band, swimming pool, bakery, jewelry store, furniture store.