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Welcome to Mercer County ...

Time Zone: Mercer County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time.

The community of Celina is the Seat for Mercer County.

Mercer County was founded April 1, 1820 and was created by taking area from Darke County.

From the Census Estimates for 2019, <1> Mercer had a population of 41,172 people. This is an increase of 0.94% since the last Census (which gave a population of 40,788 people in 2010).

At the time of the 2010 Census, Mercer represented 0.35% of the total population of Ohio.

Below are some of the communities located in Mercer County:

  • Burkettsville
    (12 miles [19.3 km] to the south)
  • Celina
    (2 miles [3.2 km] to the northeast)
    • Celina is located in Mercer County (OH)
    • Jump to our Gazetteer entry for Celina
    • Population from the 2020 Census: 10,438 people
    • Jump to TripAdvisor's Tourism page for Celina <2>
  • Chickasaw
    (9 miles [14.5 km] to the southeast)
  • Coldwater
    (3 miles [4.8 km] to the south)
  • Fort Recovery
    (11 miles [17.7 km] to the southwest)
  • Mendon
    (11 miles [17.7 km] to the northeast)
    • Mendon is located in Mercer County (OH)
    • Jump to our Gazetteer entry for Mendon
    • Population from the 2020 Census: 642 people
    • Jump to TripAdvisor's Tourism page for Mendon <2>
  • Montezuma
    (4 miles [6.4 km] to the southeast)
    • Montezuma is located in Mercer County (OH)
    • Jump to our Gazetteer entry for Montezuma
    • Population from the 2020 Census: 158 people
  • Rockford
    (11 miles [17.7 km] to the north)
  • Saint Henry
    (7 miles [11.3 km] to the south)

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.