Hartford Ball Club Grounds was a baseball grounds in Hartford, Connecticut. It was home to the Hartford Dark Blues from 1874 to 1876, two years in the National Association and one in the National League.
The Hartford club remained in the League for 1877 but played its home games at Union Grounds in Brooklyn, New York, whose last professional tenant had gone out of business.
The Hartford Base Ball Grounds was marked with a memorial bronze plaque in July 2008. The effort was led by Ronald Bolin. In February 2009 the plaque was stolen and never recovered.
In June 2013, the bases were marked with commemorative granite slabs on their approximate original locations on the grounds field just in front of the Church of the Good Shepherd's Caldwell Colt Memorial. The tribute was created and financed made by The Friends of Vintage Base Ball.