The Old Police Station, The Rocks is a heritage-listed former police station and now home to Sergeant Lok, a Modern Asian restaurant and bar, that is located at 127–129 George Street in the inner city Sydney suburb of The Rocks in the City of Sydney local government area of New South Wales, Australia. It was designed by James Barnet and built in 1882 by W. Cains and Sons. The property is owned by Property NSW, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 10 May 2002.

The subject site was the location of the first General Hospital in Sydney which operated between 1788 and 1816. In 1797 High (George) Street was realigned. The realignment required the portable hospital to be pulled down and re-erected on a stone foundation slightly west of its original location. A store and dispensary were then erected to the north and west of the hospital buildings. In 1816 the Sydney Hospital opened in Macquarie Street and the old hospital closed.

In 1836 William Davis was granted the subject site in the form of 16 perches, although an 1834 survey suggests that houses were on the site prior to this grant and therefore, Davis had probably been in informal ownership of the land. It is also possible that the Davis building was part of the 1790-1816 hospital. By 1844 The Rocks had a reticulated water supply to public fountains. Gas mains were laid in the 1850s, as were water mains. Sewerage lines were installed during the mid-1860s. Archaeological investigation could possibly uncover evidence of these on the subject site.

The Rocks had a notorious reputation for trouble and violence stretching back to its colonial beginnings as a penal colony and early trading port. The "pushes" of the Rocks were particularly notable. Law and order were kept by mounted police or "troopers", in combination with ordinary police, who could be picked out in a crowd by their bell-topper hat, black coat and white duck trousers. The mounted police wore a military uniform similar to the regular 13th Light Dragoons.

Police control of the Rocks during the mid-19th century was achieved with the Water Police in George Street, a single constable in Harrington Street, a station house in Cumberland Street, and, more to keep a watchful eye on Millers Point, a station at government ground cornered at Kent and Argyle Streets.

Gazettal of an official police force occurred in 1862, when the Police Regulation Act, No. 16 was proclaimed. The Rocks had paled in police significance and, taking into consideration factors elsewhere, was less a charge on the city conscience. There were still sporadic eruptions of violence in the nineties, and those whose business or inclinations obliged them to pass through The Cut, were still aware of the sandbag and the footpad and the garrotter in gas-lit early 20th century. But these were not confined to The Rocks.

In the 1890s a Royal Commission was formed "to make a diligent and full inquiry with the view of ascertaining the undoubted facts in the matter of alleged illicit gambling and immoralities among the Chinese resident in George-Street North, in the said City of Sydney and neighbourhood, and the alleged bribery or misconduct of any members of the NSW Police Force in relation thereto". The commission's investigation was to take three months from the 20 August 1891, but required two extensions before a final report was given in January 1892.

The two 'illegal' forms of gambling introduced by the Chinese were fan-tan (a game of chance) and pak-ah-pu (a sort of lottery). The Commission found that: