The 1908 Cincinnati Reds season was a season in American baseball. The team finished fifth in the National League with a record of 73–81, 26 games behind the Chicago Cubs.

After two straight seasons in which the Reds lost 87 games, the team replaced manager Ned Hanlon with player-manager John Ganzel. This was the first managerial job of Ganzel's career at the major league level.

Cincinnati had a new starting shortstop, as Rudy Hulswitt took over the position. Hulswitt had spent the 1907 season with the Columbus Senators of the American Association, where he hit .296 with two home runs, 35 doubles and fourteen triples. He had last played in the major leagues with the Philadelphia Phillies in 1904, where he hit .244 with a homer and 36 RBI.

The Reds' 1906 shortstop, Hans Lobert, moved to third base, while Mike Mowrey came off the bench. Outfielders Dode Paskert and John Kane became starting outfielders as Art Kruger and Fred Odwell joined the Columbus Senators in the American Association. Bob Spade, who was acquired by the Reds late in the 1907 season from the Atlanta Crackers of the Southern Association, was given a regular spot in the starting rotation. Spade was 18–12 with the Crackers in 1907 before going 1–2 with a 1.00 ERA in three starts with Cincinnati in September.

Lobert led the way offensively, hitting a team high .293 with four home runs, 63 RBI, 71 runs scored and 167 hits. Ganzel hit .250 with a homer and 53 RBI, while Miller Huggins hit .239 with no homers and 23 RBI.

Bob Ewing anchored the pitching staff once again, as he was 17–15 with a 2.21 ERA in 37 games. Spade had a solid season, going 17–12 with a 2.74 ERA, while Andy Coakley only had a record of 8–18, however, he led the team with a 1.86 ERA before being traded to the Chicago Cubs late in the season.

The Reds competed in the inaugural Cuban-American Major League Clubs Series, playing against three teams from the Cuban League. The Almendares club finished with the best record in the series.^[2]