Since 1800, the Baltimore Orioles have the highest batting average by a team, with an average of .298.

	TEAM	AVG	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS
1	Orioles	.298	1,294	.579	730	530	45,361	8,530	13,521	1,814	865	218	6,940	4,345	992	2,952	2,993		51,317	17,719	2,897	619				.372	.391	.763
2	Infants	.285	131	.423	55	75	4,804	849	1,370	213	94	27	701	509	49	345	180		5,362	1,852	334					.360	.386	.745
3	Orioles	.285	276	.435	118	153	9,349	1,476	2,666	381	218	57	1,231	786	106	797	396		10,459	3,654	656	218				.347	.391	.738
4	Giants	.284	132	.565	74	57	4,913	1,018	1,393	204	97	66	793	486	31	364	231		5,430	1,989	367					.352	.405	.757
5	Reds	.278	269	.659	174	90	9,515	2,020	2,647	386	176	106	1,548	1,303	109	499	859		10,927	3,703	668					.371	.389	.761
6	Athletics	.278	132	.519	68	63	4,855	941	1,350	187	113	49	761	431	51	321	203		5,337	1,910	349					.343	.393	.737
7	Ward's Wonders	.277	133	.576	76	56	4,887	964	1,352	186	93	34	748	502	42	369	272		5,431	1,826	313					.349	.374	.723
8	Senators	.272	1,265	.366	454	788	43,645	6,912	11,886	1,615	787	357	5,764	4,269	575	3,492	1,975		48,963	16,146	2,759	474				.345	.370	.715
9	Outlaw Reds	.271	105	.657	69	36	3,786	703	1,027	118	63	26		147		482			3,933	1,349	207						.356
10	Athletics	.271	60	.237	14	45	2,387	378	646	79	35	7	249	27		36			2,414	816	121						.342
11	Rockies	.270	5,101	.459	2,339	2,762	175,173	25,196	47,290	9,341	1,320	5,764	23,961	16,067	1,594	38,047	3,076	1,376	196,204	76,563	16,425	2,006	1,364	1,209	3,891	.334	.437	.772
12	Spiders	.269	1,802	.469	827	938	63,232	10,057	17,006	2,308	961	292	8,238	5,871	580	3,144	2,800		70,233	22,112	3,561	550				.337	.350	.686
13	Dark Blues	.268	129	.619	78	48	5,022	770	1,348	159	53	6		69					5,091	1,631	218						.325
14	Peppers	.268	312	.551	168	137	10,273	1,347	2,757	440	170	50	1,116	908	72	1,160	457		11,678	3,687	660	425				.332	.359	.691
15	Tip-Tops	.268	310	.480	147	159	10,256	1,309	2,750	430	160	78	1,134	877	92	1,223	469		11,516	3,734	668	291				.331	.364	.695
16	Red Sox	.267	19,383	.518	9,995	9,305	663,386	90,513	176,983	33,179	5,604	14,641	83,941	66,919	4,821	95,891	9,652	2,556	749,071	265,293	53,424	10,599	3,346	3,003	11,569	.337	.400	.737
17	Cardinals	.266	20,688	.513	10,549	10,008	707,638	92,566	188,025	31,877	7,052	12,896	84,620	64,287	5,223	98,420	15,027	3,619	792,275	272,694	51,825	11,977	3,150	3,779	10,156	.330	.385	.715
18	Yankees	.265	19,094	.570	10,824	8,182	650,771	92,774	172,751	28,691	5,500	17,362	86,208	68,712	4,937	95,138	11,674	2,810	737,312	264,528	51,553	9,597	3,295	2,843	10,707	.339	.406	.745
19	Guardians	.265	19,391	.513	9,892	9,408	660,866	87,630	174,908	31,195	5,501	13,946	80,991	62,720	4,845	94,876	11,939	3,394	743,260	258,943	50,642	11,467	3,362	2,551	10,551	.331	.392	.723
20	Tigers	.264	19,418	.503	9,727	9,598	662,166	89,180	174,931	29,652	6,305	14,620	82,130	65,649	4,462	97,011	11,301	2,940	746,406	261,053	50,577	11,009	3,120	2,450	10,733	.333	.394	.727
21	Grays	.264	130	.516	65	61	4,925	619	1,300	143	50	15		82					5,007	1,588	208						.322
22	Browns	.264	1,233	.644	781	432	43,777	7,933	11,555	1,658	602	304	4,657	3,473	353	436	2,307		47,743	15,329	2,564					.325	.350	.675
23	Pirates	.264	138	.547	75	62	4,968	886	1,311	200	95	31	705	492	43	410	276		5,503	1,794	326					.335	.361	.697
24	Pirates	.263	21,880	.500	10,871	10,869	749,428	97,283	197,222	32,399	8,941	12,274	86,785	64,418	5,541	99,904	15,705	3,280	835,198	284,325	53,614	12,564	3,124	3,702	10,081	.325	.379	.704
25	Giants	.263	21,804	.535	11,585	10,056	744,087	100,795	195,682	31,392	7,043	15,617	90,259	68,423	5,694	99,848	16,534	3,151	832,907	288,011	54,052	11,676	3,027	4,020	10,209	.329	.387	.716