| Official Name: | Portland, Connecticut |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Connecticut#USA |
| Pushpin Label: | Portland |
| Coordinates: | 41.5789°N -72.6317°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Connecticut |
| Subdivision Type2: | County |
| Subdivision Name2: | Middlesex |
| Subdivision Type3: | Town |
| Subdivision Name3: | Portland |
| Area Footnotes: | [1] |
| Area Total Km2: | 17.16 |
| Area Land Km2: | 15.53 |
| Area Water Km2: | 1.63 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 5813 |
| Population Density Km2: | 374.4 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 170 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 06480 |
| Area Code: | 860/959 |
| Blank Name: | FIPS code |
| Blank Info: | 09-61870 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2377853 |
Portland is a census-designated place (CDP) comprising the primary village and adjacent residential land in the town of Portland, Middlesex County, Connecticut, United States. It is in the southwest part of the town, bordered to the west and south by the Connecticut River, which forms the border with Cromwell to the west and Middletown to the south. The Portland CDP extends north along Main Street (Connecticut Route 17A) to its junction with Gospel Lane (Connecticut Route 17) at Fogelmarks Corners, and the eastern extent of the CDP is at Rose Hill Road and Collins Hill Road. The CDP includes the neighborhood of Gildersleeve in the north.
As of the 2020 census, the CDP had a population of 5,813,[2] out of 9,384 in the entire town of Portland.