A lock for use with an associated toilet having a rim portion and a generally outwardly oriented, depending surface, and having a seat cover thereon includes a releasably engageable receiving member and locking member. The receiving member has a housing and a pivotably connected mounting member. The mounting member is mountable to the rim portion of the bowl on the depending surface thereof. The housing includes at least one lock receiving element therein. The releasably engageable locking member has an elongated cover retaining element and at least one biased locking element. The locking element includes a releasing member thereon for releasing the locking member from the lock receiving element.