The Humane Society of the Ohio Valley has been in existence for 150 years and can boast of being the oldest organization of its kind in the State of Ohio and one of the oldest in the USA. We are located at 90 Mount Tom Road, Marietta, Ohio and easy to find. From State Route 7 North, turn onto County House Lane at the light in front of Lowes. You will drive just under a mile to the top of a hill and turn right onto Mt. Tom Road across from the Washington County Home, past a big white barn on your left, and in a curve, you will take the gravel road on the right and we are at the end of that road.