Thomas Grosvenor was the second surviving son of Sir Thomas Grosvenor, 3rd Baronet. His two oldest brothers had died young.[1] and his elder surviving brother Richard became the 4th Baronet.
In 1727 Richard and Thomas won the two parliamentary seats for the city of Chester.
Thomas succeeded to the baronetcy when Richard died in July 1732. However, by that time he was already very ill with tuberculosis himself and, having been advised to travel to Italy, died in Naples in the following February.[2] Having no children, he was succeeded by his younger brother Robert.