The woman, who gave her name only as Wendy, said she discovered the 7.5-inch-wide footprint -- which she said has five toes like a human -- in her Ashtabula County back yard while she was doing yard work Aug. 11, WEWS-TV, Cleveland, reported Tuesday.
"It was in a low spot in our backyard. The ground was wet," she said. "It's much larger than anything me or my husband has ever seen.
"It's hard to tell how long it is," Wendy said, "But, it's not a footprint anyone around here recognizes."
She said experts have taken a look at pictures of the footprint and ruled out bears.
Wendy said she and her husband have previously heard bizarre noises while outside during the past five years, and about three years ago she caught sight of a very large, dark colored figure near her home.
"Just down the road, at dusk, we were driving across the railroad tracks. I caught a quick glimpse of a large dark figure. It appeared to be dressed in all black running across the tracks. I thought to myself, why would a hunter be dressed in all black at sunset?" she said.
Marc DeWerth, a member of the Ohio Bigfoot Association, said in a lecture this summer he personally saw Bigfoot in Coshocton County in 1997, and said park rangers have told him numerous Bigfoot sightings had been reported during the past 20 years by hunters, farmers and other travelers in Medina, Wayne and Summit counties.