This year’s senior class at Granville High School is more than 15 percent larger than the graduating class of 2012.

Principal Jim Donnelly said there are a number of reasons for the increase, including the fact that seven seniors moved into Granville for their final year.

According to figures as of Sept. 19, there are 129 students listed as seniors at the high school, but Donnelly said two of those had moved out of district, leaving the current number at 127.

There were more than 105 seniors last year, but some did not graduate. Among this year’s seniors are two who were seniors last year and another who dropped out but re-enrolled.

The junior and sophomore classes are smaller than in the past. There are 106 sophomores and 105 juniors. The ninth-grade class is at 121. The enrollment numbers were provided by Diane Quick, the district’s director of information services.

According to Donnelly, there were 113 juniors at the end of last school year. Besides the seven new students, the two students back from last year and the re-enrolled students, there were two students listed as sophomores last year who have earned senior status and are on track to graduate.

Donnelly said the larger-than-usual senior class did not have any effect on the number of teachers needed in the school, because some classes are slightly lower than average and the number of students in the six grades at the school is not unusually high or low.

The district has 33 students in prekindergarten. The school limits the number of students in pre-K to 18 per class.

There are 81 students in kindergarten, 75 in first grade, 84 in second and 67 in third. The number jumps to 90 in fourth grade, 80 in fifth and 82 in sixth.

The seventh-grade number always represents a jump, because it includes students from Vermont. There are 93 seventh-graders and 114 eighth-graders.

School officials note the numbers can fluctuate.