NY 9N was extended south to Lake George in March 1936, supplanting both NY 47 and NY 195 in an effort to aid tourists. From Westport to Hague, NY 9N overlapped with NY 22 (from Westport to Ticonderoga) and NY 8 (from Crown Point to Hague). The route was extended once more in November 1953 to its current southern terminus in Saratoga Springs, replacing NY 9K and creating a short overlap with US 9 through Lake George village in the process. The overlap with NY 8 was eliminated in the mid-1960s when that route was truncated to end at its junction with NY 9N in Hague.