| Irvin | community in E Transylvania County served by post office, 1889-1901. Later known as Blantyre, which see. |
| Irvin River | See Smith River. |
| Irvins Creek | rises in E Mecklenburg County and flows SW into McAlpine Creek. |
| Irvins Crossroads | community in S Lenoir County. |
| Irvinsville | a town authorized in 1815 to be laid out in SW Cleveland County (then Rutherford County) on Broad River opposite Quinn's Ferry. The town seems not to have developed as expected and the last mention of it occurs in local records of 1828. |
| Irwin Creek | rises in N Mecklenburg County and flows SW into Stewart Creek. |
| Isaac Creek | rises in SE Craven County and flows N into Adams Creek. |
| Isaac Hollow | W Watauga County, extends SE N of George Gap Branch. |
| Isaac Parlier's Creek | See Purlear Creek. |
| Isaac Walton Lake | formerly Water Works Lake, in W Person County on Storys Creek at the mouth of Satterfield Creek. Formed prior to 1928. Covers 213 acres; max. depth 25 ft. Owned by the town of Roxboro. |