W. W. Phelps identifies the Hill Cumorah as being in New York.
William W. Phelps, “The Book of Mormon,” The Evening and the Morning Star 1, no. 8 (January 1833): 57
This was welcome news to them that looked for the gathering of the righteous, in the last days. They, from a perusal of this book, aided by the Spirit of God, began to see eye to eye in some things, and to lift up their heads and rejoice. But before the glorious and happy results of this book are set forth, it seems necessary to go back to the time it was brought forth. In the year one thousand eight hundred and twenty seven, the plates came forth from the hill Cumorah, which is in the county of Ontario, and state of New-York, by the power of God. In less than three years after, it was translated by the gift and power of God, and then published; and on the 6th of April, 1830, the church of Christ was organized, with six members. It may be just to remark, that this church was established by revelation, as the church of Christ always has been, since the world began, to be acknowledged by him.