The 2018 IndyCar Grand Prix, officially known as the 2018 IndyCar Grand Prix presented by Sea-Doo for sponsorship reasons, was the fifth round of the 2018 IndyCar Series season. The race took place over 85 laps on the infield road course at Indianapolis Motor Speedway in Speedway, Indiana. Will Power, driving for Team Penske, won the race.

This was the first IndyCar Indianapolis Motor Speedway Road Corse race to not feature a DNF.

Pos	No.	Name	Grp.	Round 1	Round 2	Firestone Fast 6
1	12	Will Power W	2	1:09.8557	1:09.9156	1:09.8182
2	6	Robert Wickens R	1	1:09.5215	1:09.8481	1:09.9052
3	18	Sébastien Bourdais	2	1:09.5510	1:09.9973	1:09.9449
4	5	James Hinchcliffe	1	1:09.8244	1:09.9570	1:10.0858
5	20	Jordan King R	1	1:09.8735	1:09.8879	1:10.1326
6	1	Josef Newgarden	1	1:10.0768	1:10.0067	1:10.7276
7	22	Simon Pagenaud W	2	1:09.8982	1:10.0382
8	27	Alexander Rossi	2	1:10.0596	1:10.1062
9	21	Spencer Pigot	1	1:09.8657	1:10.1601
10	3	Hélio Castroneves	1	1:10.0825	1:10.1847
11	30	Takuma Sato	2	1:10.0492	1:10.1979
12	14	Tony Kanaan	2	1:10.0379	1:10.3592
13	28	Ryan Hunter-Reay	1	1:10.0985
14	98	Marco Andretti	2	1:10.1044
15	10	Ed Jones	1	1:10.2859
16	59	Max Chilton	2	1:10.2113
17	15	Graham Rahal	1	1:10.3605
18	9	Scott Dixon	2	1:10.3221
19	19	Zachary Claman DeMelo R	1	1:10.5064
20	26	Zach Veach R	2	1:10.3371
21	4	Matheus Leist R	1	1:10.6425
22	88	Gabby Chaves	2	1:10.5066
23	23	Charlie Kimball	1	1:10.7784
24	32	Kyle Kaiser R	2	1:10.7394
OFFICIAL BOX SCORE Archived 2018-05-13 at the Wayback Machine

Source for individual rounds:^[1]

Pos	No.	Driver	Team	Engine	Laps	Time/Retired	Pit Stops	Grid	Laps Led	Pts.1
1	12	Will Power W	Team Penske	Chevrolet	85	1:49:46.1935	3	1	56	54
2	9	Scott Dixon	Chip Ganassi Racing	Honda	85	+2.2443	3	18		40
3	6	Robert Wickens R	Schmidt Peterson Motorsports	Honda	85	+8.1621	3	2	20	36
4	18	Sébastien Bourdais	Dale Coyne Racing with Vasser-Sullivan	Honda	85	+8.7293	3	3	1	33
5	27	Alexander Rossi	Andretti Autosport	Honda	85	+11.7462	3	8	2	31
6	3	Hélio Castroneves	Team Penske	Chevrolet	85	+14.3860	3	10		28
7	5	James Hinchcliffe	Schmidt Peterson Motorsports	Honda	85	+15.3368	3	4		26
8	22	Simon Pagenaud W	Team Penske	Chevrolet	85	+17.2354	4	7		24
9	15	Graham Rahal	Rahal Letterman Lanigan Racing	Honda	85	+18.0987	3	17	3	23
10	30	Takuma Sato	Rahal Letterman Lanigan Racing	Honda	85	+23.1137	4	11		20
11	1	Josef Newgarden	Team Penske	Chevrolet	85	+24.2632	3	6	1	19
12	19	Zachary Claman DeMelo R	Dale Coyne Racing	Honda	85	+30.0421	3	19		18
13	98	Marco Andretti	Andretti Herta Autosport with Curb-Agajanian	Honda	85	+37.4374	3	14		17
14	14	Tony Kanaan	A. J. Foyt Enterprises	Chevrolet	85	+41.3456	4	12		16
15	21	Spencer Pigot	Ed Carpenter Racing	Chevrolet	85	+41.6927	6	9		15
16	59	Max Chilton	Carlin	Chevrolet	85	+42.8434	3	16		14
17	88	Gabby Chaves	Harding Racing	Chevrolet	85	+45.0983	5	22		13
18	26	Ryan Hunter-Reay	Andretti Autosport	Honda	85	+53.1086	3	13		12
19	32	Kyle Kaiser R	Juncos Racing	Chevrolet	85	+58.1755	4	24	2	12
20	23	Charlie Kimball	Carlin	Chevrolet	85	+1:11.7538	4	23		10
21	4	Matheus Leist R	A. J. Foyt Enterprises	Chevrolet	85	+1:17.9918	4	21		9
22	10	Ed Jones	Chip Ganassi Racing	Honda	84	+1 Lap	4	15		8
23	26	Zach Veach R	Andretti Autosport	Honda	84	+1 Lap	5	20		7
24	20	Jordan King R	Ed Carpenter Racing	Chevrolet	83	+2 Laps	4	5		6
OFFICIAL BOX SCORE Archived 2018-05-13 at the Wayback Machine

Notes: ¹ Points include 1 point for leading at least 1 lap during a race, an additional 2 points for leading the most race laps, and 1 point for Pole Position.

Drivers' Championship standings Pos Driver Points 1 Josef Newgarden 178 2 Alexander Rossi 176 3 Sébastien Bourdais 152 3 4 Scott Dixon 147 5 James Hinchcliffe 144

Manufacturer standings Pos Manufacturer Points 1 Honda 414 2 Chevrolet 354

• Note: Only the top five positions are included.