McArthur Lake, MacArthurs Lake or MacArthur's Lake is the name of several lakes in Australia, Canada and the United States:
| Australia | -34.7414°N 142.1554°W | MacArthur's Lake | Small seasonal lake in the Raak Plain boinka. In January the water table is 2to below the lake floor. Salinity in the lake rises from 149,000 mg/L in July to 206,000 mg/L in September due to evaporative concentration. | |
| Canada | 51.3325°N -16.3379°W | In the Yoho National Park, long and deep. | ||
| 61.5781°N -106.8297°W | On the Taltson River in the Northwest Territories. About long from east to west. Apparently the lake that the explorer Samuel Hearne named "Clowey Lake". | |||
| 45.7634°N -61.2462°W | MacArthurs Lake | In Inverness County, just west of Big Brook Road. Drains into Big Brook. A railway line runs along its east shore between the lake and the road. It is at an elevation of . | ||
| 45.7878°N -60.3027°W | MacArthurs Lake | In Cape Breton Regional Municipality. It is just north of MacMullin Lake, to which it is connected by a channel, and south of Figure of Eight Lake. It lies to the west of Grand Mira North Road. It has been described as "a beautiful pond". Like MacMullin Lake it is part of the Framboise River watershed. It is at an elevation of . | ||
| McArthur's Lake | An 1884 report mentions McArthur's Lake on the Pugwash River of Nova Scotia, formed by a dam to provide power for McArthur's saw mill. The dam had no ladder, so fish could not make their way up the river, and the lake was heavily polluted by sawdust. | |||
| 48.2061°N -81.2156°W | McArthur Lake | About 40 kilometres (25 mi) south of the city of Timmins. The lake has a rocky shoreline with three main bays and thirteen islands. The west side has more than 20 camps and cottages. Used for kayaking, boating and fishing for walleye and northern pike. | ||
| 45.7081°N -75.6703°W | Lac McArthur | In the Outaouais region of Quebec. Fed by the Rivière Blanche from Lac Saint-Pierre and empties into Lac Grand to the southeast. | ||
| 45.8447°N -75.8586°W | Lac McArthur | Also in the Outaouais, at an elevation of . Near to Denholm and the Réserve écologique André-Linteau. | ||
| 57.7625°N -105.0519°W | McArthur Lake | The term "McArthur Lake" is sometimes used to refer to the McArthur River uranium mine, operated by Cameco. However, this "lake" is not recognized in the official Gazetteer of Canada as of 1998. | ||
| 52.5643°N -104.354°W | McArthur Lake | To the east of Pleasantdale, Saskatchewan. The surrounding area is mainly agricultural land. | ||
| 55.2501°N -102.4004°W | McArthur Lake | About east of Pelican Narrows at an elevation of . The lake is near Attitti Lake. McArthur Lake, Robbestad Lake and the northern part of Kakinagimak Lake drain northward via the Nemei River into Churchill River. | ||
| United States | 48.5139°N -116.4497°W | McArthur Lake | On Deep Creek. The riparian zones are protected by the McArthur Lake Wildlife Management Area. | |
| 35.3413°N -78.0147°W | McArthur Lake | Small lake in Goldsboro, North Carolina. | ||
| 35.1833°N -79.2576°W | McArthur Lake | Fort Bragg, North Carolina. Has a length of, covers and has an average depth of about . Fish include largemouth bass, bluegill, redear sunfish, warmouth, flier, pickerel and bullhead catfish. |