The Jan F. and Antonie Janko Farmstead District is an agricultural historic district located west of Ely, Iowa, United States. It was listed on the National Register of Historic Places in 2000. At the time of its nomination it consisted of seven resources, which included five contributing buildings, one contributing structure, and one non-contributing structure. The historic buildings include a two-story, wood frame, side gable house (1887); a gabled basement barn (c. 1887); a gabled barn (1893); chicken house (1880s, with additions from the 1940s or 1950s), and a single-stall garage (1910s-1930s). The corncrib (1910s or 1920s) is the historic structure. A three-stall garage (1972) is the non-contributing structure. The farmstead is located on a hilltop and sideslope. The house sits on the