The 2012 Harrisburg City Islanders season was the club's ninth season of competitive soccer - its ninth season in the third division of American soccer and its second season in the USL Professional Division; the City Islanders being one of the original 10 founder-members.

City Islanders finished the 2012 USL Pro season by finishing sixth in the table, good enough for a berth into the 2012 USL Pro Playoffs, marking their second-consecutive season of postseason play. However, in the first round, Harrisburg suffered a 2–1 defeat at Charleston Battery thus, ending their postseason ambitions.

Source

Source: USL Pro official standings
Rules for classification:Points, then tiebreak: 1) Head-to-head record based on total points in League games, 2) Total wins in League games, 3) Goal difference in League games, 4) Goals scored in League games, etc.
(CC) = Commissioner's Cup (best regular season record); (A) = Advances to USL Pro Playoffs; (D) = Divisional winners.
Only applicable when the season is not finished:
(Q) = Qualified for the USL Pro Playoffs, but not yet to the particular phase indicated; (E) = Eliminated from playoff-contention.

All times in Eastern Time.

Last updated: January 22, 2017
Source: 2012 USL Pro season
Pld = Matches played; Pts = Points; W = Matches won; T = Matches tied; L = Matches lost; GF = Goals for; GA = Goals against; GD = Goal difference

Ground: A = Away; H = Home. Result: T = Tie; L = Loss; W = Win; P = Postponed.

The City Islanders were beaten in the quarterfinals of the 2012 USL Pro season playoffs by the Charleston Battery. The South Carolina club ran out 2–1 winners and would eventually win the 2012 USL Pro Championship against Wilmington Hammerheads.

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