Since 1990, Ryan Howard has the most ribbies in a month, with 41 RBIs in August 2006.

Interpreted as:

most rbis by a player in a month since 1990

	NAME	RBI	MONTH	G	AB	R	H	2B	3B	HR	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Ryan Howard R. Howard	41	August 2006	29	112	25	39	3	0	14	22	3	33	0	0	138	84	17	0	1	10	1	.348	.464	.750	1.214
2	Troy Tulowitzki T. Tulowitzki	40	September 2010	28	115	30	37	6	2	15	9	1	19	2	0	125	92	23	0	0	1	3	.322	.376	.800	1.176
3	Ryan Klesko R. Klesko	40	May 2001	27	99	27	35	8	1	11	23	0	14	10	0	125	78	20	0	3	1	2	.354	.464	.788	1.252
4	Sammy Sosa S. Sosa	40	June 1998	27	114	25	34	2	0	20	6	0	27	0	2	121	96	22	0	1	0	3	.298	.331	.842	1.173
5	Jim Thome J. Thome	39	July 2001	28	97	22	37	5	0	12	25	2	37	0	0	124	78	17	0	0	3	0	.381	.516	.804	1.320
6	Rafael Palmeiro R. Palmeiro	39	August 1999	30	110	25	35	4	1	15	14	0	17	0	0	128	86	20	0	4	1	1	.318	.383	.782	1.165
7	Dante Bichette D. Bichette	39	June 1996	29	128	28	48	12	0	11	5	0	20	7	0	134	93	23	0	1	0	2	.375	.396	.727	1.122
8	Ken Caminiti K. Caminiti	38	August 1996	28	96	24	33	4	1	14	17	0	20	3	1	117	81	19	0	4	4	1	.344	.427	.844	1.271
9	Juan Gonzalez J. Gonzalez	38	July 1996	27	108	22	44	10	0	15	14	0	15	0	0	123	99	25	0	1	7	2	.407	.472	.917	1.388
10	Aaron Judge A. Judge	37	June 2024	25	88	25	36	5	1	11	16	3	26	3	0	107	76	17	0	0	2	2	.409	.514	.864	1.378
11	Giancarlo Stanton G. Stanton	37	August 2017	29	109	28	38	6	0	18	14	3	31	1	0	127	98	24	0	1	4	2	.349	.433	.899	1.332
12	Albert Belle A. Belle	37	June 2000	27	107	18	39	4	0	12	12	0	14	0	1	120	79	16	0	1	3	4	.364	.425	.738	1.163
13	J.D. Martinez	36	September 2017	24	99	26	40	8	0	16	7	0	29	1	0	107	96	24	0	1	1	7	.404	.439	.970	1.409
14	Nolan Arenado N. Arenado	36	August 2016	28	104	27	37	4	1	10	18	0	14	0	0	127	73	15	0	5	2	5	.356	.433	.702	1.135
15	Sammy Sosa S. Sosa	36	August 2001	29	109	31	42	3	3	17	16	3	24	0	1	130	102	23	0	2	3	0	.385	.469	.936	1.405
16	Jeff Bagwell J. Bagwell	36	July 2001	28	111	22	37	9	1	9	9	0	26	1	1	121	75	19	0	1	1	6	.333	.380	.676	1.056
17	Todd Helton T. Helton	36	May 2001	29	108	27	40	14	0	9	25	0	17	1	1	134	81	23	0	1	2	2	.370	.485	.750	1.235
18	Manny Machado M. Machado	35	August 2017	29	126	23	43	6	1	12	3	0	11	3	1	132	87	19	0	3	1	4	.341	.348	.690	1.039
19	Josh Donaldson J. Donaldson	35	August 2015	27	105	29	34	7	1	11	16	1	25	2	0	125	76	19	0	3	0	3	.324	.408	.724	1.132
20	Edwin Encarnacion E. Encarnacion	35	August 2015	23	86	23	35	11	0	11	9	2	15	0	0	100	79	22	0	3	1	0	.407	.460	.919	1.379
21	Albert Pujols A. Pujols	35	June 2009	29	97	19	31	10	0	14	19	0	14	2	1	117	83	24	0	1	8	4	.320	.427	.856	1.283
22	David Ortiz D. Ortiz	35	July 2006	26	109	26	37	6	1	14	16	1	27	1	0	126	87	21	0	0	4	2	.339	.429	.798	1.227
23	Ryan Howard R. Howard	35	May 2006	27	102	17	29	3	0	13	6	1	26	0	0	112	71	16	0	3	1	1	.284	.321	.696	1.018
24	Jason Bay J. Bay	35	May 2006	27	109	21	35	2	1	12	14	2	23	2	0	127	75	15	0	2	2	2	.321	.402	.688	1.090
25	Mark Teixeira M. Teixeira	35	September 2005	27	104	18	37	8	1	9	13	3	17	0	0	121	74	18	0	1	2	3	.356	.438	.712	1.150