| Official Name: | Mersa City Administration |
| Other Name: | Mersa-Abagetye |
| Native Name: | Amharic: መርሳ |
| Settlement Type: | City administration |
| Pushpin Map: | Ethiopia |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location within Ethiopia |
| Subdivision Type: | Country |
| Subdivision Name: | Ethiopia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Amhara |
| Subdivision Type2: | Zone |
| Subdivision Name2: | North Wollo |
| Subdivision Type3: | Woreda |
| Subdivision Name3: | Habru |
| Subdivision Type4: | Kebele |
| Government Type: | City Administration |
| Leader Title: | Mayor |
| Leader Name: | Wendwesen Ayalew |
| Established Title: | Legend has it that Mersa was founded as a village in the 16th century |
| Established Date: | 16th century |
| Established Date2: | ca. 1966 |
| Established Date3: | 16/11/2009 |
| Area Total Km2: | 14.84 |
| Population Footnotes: | As per Mersa Communication Facebook information. |
| Population Total: | 41253 |
| Timezone: | EAT |
| Utc Offset: | +3 |
| Coordinates: | 11.6667°N 78.5°W |
| Elevation M: | 1600 |
| Area Code: | 033 |
| Mersa | |
| Coor Pinpoint: | Latitude : 11.667Longitude : 39.650 |
Mersa (Amharic: መርሳ) also known as Mersa-Abagetye (Amharic፡ መርሳ አባ ጌትየ)is a city administration in Habru Woreda of the Semien Wollo (North Wollo) of the Amhara Region (or kilil) in Ethiopia. It has a latitude and longitude of 11.6667°N 78.5°W, with an elevation of 1600 meters. The city it is the administrative center of Habru Woreda. Mersa is located along Ethiopian Highway 2.
Mersa was a victim of rocket attack by Derg at the beginning of 1990. Jenny Hamond described the incident as: "It was the site of a terrible atrocity by the retreating Derg forces as the Front fighters closed in on them in 1990. They retreated to a safe distance and then they turned their heavy BM rocket launchers onto the defenseless town."[1]