| Official Name: | Improvement District No. 4 |
| Other Name: | Improvement District No. 04 (Waterton) |
| Settlement Type: | Improvement district |
| Mapsize: | 200 |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Alberta |
| Subdivision Type2: | Region |
| Subdivision Name2: | Southern Alberta |
| Subdivision Type3: | Census division |
| Subdivision Name3: | No. 3 |
| Government Footnotes: | [1] |
| Leader Title: | Governing body |
| Leader Name: | Improvement District No. 4 Council |
| Leader Title1: | Chair |
| Leader Name1: | Ken Black |
| Leader Name2: | Scott Barton |
| Leader Title3: | MLA |
| Leader Name3: | Chelsae Petrovic |
| Established Title: | Established |
| Established Date: | January 1, 1944 |
| Established Title2: | Renumbered |
| Established Date2: | January 1, 1945 January 1, 1969 |
| Area Footnotes: | (2021) |
| Area Land Km2: | 482.54 |
| Population As Of: | 2021 |
| Population Total: | 158 |
| Population Density Km2: | 0.3 |
| Timezone: | MST |
| Utc Offset: | −7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | −6 |
| Coordinates: | 49.0833°N -167°W |
Improvement District No. 4, or Improvement District No. 04 (Waterton), is an improvement district in Alberta, Canada. Coextensive with Waterton Lakes National Park in southern Alberta, the improvement district provides local governance for lands within the park that are not within an Indian reserve.
Prior to 1944, those lands within Improvement District (ID) No. 4 were split between the Municipal District of Kerr No. 39 and the Municipal District of Castle River No. 40. Following a partial amalgamation of the two municipal districts, remnant unsurveyed lands were incorporated as ID No. 11 on January 1, 1944. It was renumbered to ID No. 8 on April 1, 1945 and again to ID No. 4 on January 1, 1969.[1]
While there are no urban municipalities within Improvement District No. 4 there is one hamlet named Waterton Park.[1] Blood 148A, a First Nation reserve of the Kainai Nation, is also within Improvement District No. 4.[2]
The following localities are within Improvement District No. 4.[3]
In the 2021 Census of Population conducted by Statistics Canada, Improvement District No. 4 had a population of 158 living in 67 of its 209 total private dwellings, a change of from its 2016 population of 105. With a land area of, it had a population density of in 2021.[4]
The population of Improvement District No. 24 according to its 2018 municipal census is 108.[5] The municipal census also counted a shadow population – temporary residents employed in the municipality – of 405 for a combined population of 513.[5]
In the 2016 Census of Population conducted by Statistics Canada, Improvement District No. 4 had a population of 105 living in 39 of its 168 total private dwellings, a change of from its 2011 population of 88. With a land area of 485.66km2, it had a population density of in 2016.[6]
Improvement District No. 4 is governed by a five-person council comprising a chair and four councillors. Ken Black is the chair of the council.[1]