The J. K. Wadley House is a historic house located at 618 Pecan Street in Texarkana, Arkansas.

Built in 1895, it is a two-story, wood-framed structure, and is notable as a fine local example of the Free Classical type of Queen Anne styling. It is also locally significant as being the longtime home of John Keener Wadley, a lumber, railroad, and oil baron listed as one of the wealthiest men in the United States. The house features a wraparound porch with a pedimented gable, supported by grouped columns. The exterior is finished in clapboarding on the lower level and decorative cut shingles on the upper level. A low onion-domed turret rises from the southern corner.

The house was listed on the National Register of Historic Places on February 12, 1999. It currently functions as a bed and breakfast.

• Augustus M. Garrison House, also part of the Wadley B&B, 600 Pecan Street
• National Register of Historic Places listings in Miller County, Arkansas