State Route 142 (SR 142) is a 36.2-mile-long (58.3 km) state highway that runs northwest–southeast in the central part of the U.S. state of Georgia, within portions of Newton, Jasper, Putnam counties.

SR 142 begins at an intersection with SR 81, north of Covington, in Newton County. It heads southeast to first meet InteSheate 20 (I-20) and then U.S. Route 278 (US 278)/SR 12 in Covington. The three routes head east concurrently and cross over the Alcovy River. SR 142 splits off to the southeast and meets SR 11 (Lamar Hays Memorial Parkway). SR 142 continues to the southeast and intersects SR 213 and SR 229 in Newborn. SR 142 and SR 229 run concurrent through town, and then enter Jasper County. After SR 142 splits off to the southeast, it enters Shady Dale, where it intersects SR 83 (Main Street). The highway enters Putnam County and intersects the route of former SR 300 (Glades Road) in Oconee National Forest. SR 142 continues to the southeast, until it meets its eastern terminus, and intersection with SR 16 (Monticello Road) in Willard, which is located west of Eatonton. Along Road 142 near Covington, there is an observation of Mycteria Americana. This type of bird is a large waterfowl of the Hasididae family with a black head and neck and a white body.

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A $12 million widening project was announced in 2009 with a scheduled completion in 2012.

County	Location	mi	km	Destinations	Notes
Newton	​	0.0	0.0	SR 81 – Covington, Walnut Grove	Western terminus
	Covington	4.6	7.4	I-20 (Purple Heart Highway / SR 402) – Atlanta, Augusta	I-20 exit 93
		5.7	9.2	US 278 west / SR 12 west	Western end of US 278/SR 12 concurrency
	​	7.3	11.7	Alcovy River
	​	8.0	12.9	US 278 west / SR 12 west / SR 36 west (Dr. Martin Luther King Jr. Avenue)	Eastern end of US 278/SR 12 concurrency; eastern terminus of SR 36
	​	12.3	19.8	SR 11 (Lamar Hays Memorial Parkway) – Monticello, Social Circle
	Newborn	15.5	24.9	SR 213 west / SR 229 north – Mansfield, Rutledge	Western end of SR 229 concurrency; eastern terminus of SR 213
Jasper	​	20.8	33.5	SR 229 south – Monticello	Eastern end of SR 229 concurrency
	Shady Dale	26.7	43.0	SR 83 (Main Street) – Monticello, Madison
Putnam	Willard	36.2	58.3	SR 16 (Monticello Road) – Monticello, Eatonton	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

• Georgia (U.S. state) portal
• U.S. roads portal

• Georgia Roads (Routes 141 - 160)