Frank Grover is a former New Zealand politician. He was an MP from 1996 to 1999, representing first the Alliance and then the Christian Heritage Party.

Grover was originally a member of the National Party, but became disillusioned with National's economic policy under Minister of Finance Ruth Richardson. Richardson promoted strong free market economic theories, which were popular with some sections of the party, but resented by more conservative elements. Gilbert Myles and Hamish McIntyre, two National MPs who believed that Richardson's reforms were deeply harmful to society, split from the party in 1992, founding the new Liberal Party. Grover was one of those who accompanied them.

Soon afterwards, the Liberals chose to join the Alliance, a broad left-wing coalition which they saw as the most significant opponent of Richardson and her allies. Some members of the Liberals, quite possibly including Grover, were unhappy at this decision, however — while they opposed Richardson's reforms, they did not see themselves as left-wing. Following the failure of either Myles or McIntosh to be re-elected, Myles decamped to the newly-founded New Zealand First party and McIntosh retired. Grover assumed the leadership of the Liberals in 1994.

Grover was elected to Parliament in the 1996 elections as an Alliance list MP. He disagreed with the Alliance on a number of issues, however, and on 11 June 1999, not long before the 1999 elections, he officially quit the Alliance to join the Christian Heritage Party. This gave the CHP its first ever seat in Parliament. Grover's switch was strongly criticised by other parties, particularly the Alliance but also New Zealand First, which had also experienced defections. In the elections, Grover was ranked sixth on Christian Heritage's list, but the party failed to win any seats. Grover therefore left Parliament.

Before entering politics, Grover had a background in law, having received an LLB from Auckland University. He worked as a magistrate in Hong Kong from 1979 to 1983.