East Branch Martins Creek begins in a small, unnamed pond in New Milford Township.

It flows west-southwest for a short distance before turning southwest for several tenths of a mile, receiving an unnamed tributary from the right and entering Harford Township.

Here, the creek flows south-southwest for more than a mile, receiving another unnamed tributary from the right before turning south and passing through a wetland and Beaver Meadow Pond.

[3] The elevation near the mouth of East Branch Martins Creek is 945 feet (288 m) above sea level.

[2] East Branch Martins Creek was entered into the Geographic Names Information System on August 2, 1979.

[4] On April 2, 2014, a permit was issued authorizing the operation, commencement, and restoration of a quarry for which the receiving stream was East Branch Martins Creek, as was a permit authorizing mining-related stormwater discharges for which the receiving stream was East Branch Martins Creek.