Elco
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 0.279
- State:
- Pennsylvania
Elco is a borough located in Washington County, Pennsylvania. Elco has a 2026 population of 257. Elco is currently declining at a rate of -1.15% annually and its population has decreased by -2.28% since the most recent census, which recorded a population of 263 in 2020.
The median household income in Elco is $83,224 with a poverty rate of 20.86%. The median age in Elco is 46.3 years: 45.9 years for males, and 46.5 years for females. For every 100 females there are 113.7 males.