Arkansas Highway 98 (AR 98 and Hwy. 98) is an east–west state highway in Columbia County, Arkansas. The route of 47.15 miles (75.88 km) runs essentially in an incomplete loop with Magonlia at its center. The route begins at US 82 near Waldo and intersects US 371, US 79, US 82, and US 79 before terminating at Highway 19. An officially designated exception over US 371 of 1.12 miles (1.80 km) occurs near the eastern terminus.

AR 98 begins at US 82 west of Waldo. An officially designated exception begins at U.S. Route 371 (Olive Street) in Waldo, and an overlap of 1.12 miles (1.80 km). Continuing east past the National Register of Historic Places-listed Waldo Water Tower, AR 98 intersects AR 98B (its only business route) in McNeil. The highway forms a concurrency with US 79 briefly north before turning east then south.

Highway 89 continues south through the community of Village before intersecting US 82 in east Columbia County. The route passes near the W. H. Allen House in rural Columbia County and the William H. Smith House in Atlanta. Now turning west the route passes through Emerson where it intersects US 79 and becomes Main Street. The highway continues west to Walkerville, where it ends at Arkansas Highway 19.

The entire route is in Columbia County.

Highway 98 Business (AR 98B, Ark. 98B, and Hwy. 98B) is a business route in McNeil. It is 0.94 miles (1.51 km) in length. Prior to designation as Hwy. 98B in 1970, the route was designated as US 79 City.