Frederick George Archibald (died 1979) was a Fijian planter and politician.

In the 1947 Legislative Council elections he contested the Eastern constituency and defeated incumbent MLC Harold Brockett Gibson.

However, after the election the result was challenged on the basis that Archibald was 'not of sound mind' and therefore ineligible to be a candidate.

[3] Although the petition was initially dismissed as having been lodged outside the required time limit, in August the Attorney General asked the Supreme Court to declare the seat vacant.

[4] Subsequently, Archibald often challenged other MLCs to prove their sanity during debates, showing his certificate and claiming he was the only MLC who could.