| Arnold Creek | |
| Settlement Type: | Neighborhood |
| Map Alt: | Arnold Creek neighborhood boundaries |
| Coordinates: | 45.4413°N -122.6998°W |
| Coordinates Footnotes: | PDF map |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Oregon |
| Subdivision Type2: | City |
| Subdivision Name2: | Portland |
| Leader Title1: | Association |
| Leader Name1: | Arnold Creek Neighborhood Association |
| Leader Title2: | Coalition |
| Unit Pref: | US |
| Area Total Km2: | 2.76 |
| Population Footnotes: | [1] |
| Population Total: | 2930 |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Demographics Type1: | Housing |
| Demographics1 Title1: | No. of households |
| Demographics1 Info1: | 1037 |
| Demographics1 Title2: | Occupancy rate |
| Demographics1 Info2: | 97% occupied |
| Demographics1 Info3: | 976 households (94%) |
| Demographics1 Title4: | Renting |
| Demographics1 Info4: | 61 households (6%) |
| Demographics1 Title5: | Avg. household size |
| Demographics1 Info5: | 2.83 persons |
Arnold Creek is a neighborhood (and a creek) in the Southwest section of Portland, Oregon, just north of the city of Lake Oswego and Clackamas County. It borders West Portland Park to the west, Markham and Marshall Park to the north, Collins View and Tryon Creek State Natural Area to the east, and Lake Oswego and the unincorporated Multnomah County enclave of Englewood to the south.
Part of Maricara Natural Area (1988) is located in Arnold Creek (as well as in Markham).